Bar
Unclaimed profileSiren Cocktail Bar
Boulder, CO · $$
Inebrious
Beverage Program Score
The editorial take
The cocktail list at Siren Cocktail Bar runs 14 drinks across Fizzy, Juicy, and Boozy sections, plus 8 martinis, with prices from $10 to $16. The Siren Martini takes vodka, dry vermouth, gin, sherry, and bitters, and a spoonful of caviar is a $10 add. The Espresso Martini and Flip Ship martini are named favorites. Happy hour drops signatures to $9–$12, and the non-alcoholic side is unusually complete: NA cocktails, an NA martini, NA beer, kombucha, and botanical soda.
- What should I order?
- Start with the Siren Martini, a vodka, dry vermouth, gin, sherry, and bitters build that can take a $10 spoonful of caviar. The Espresso Martini, with cold brew, coffee liqueur, grappa, and mascarpone creme, is a customer-named favorite. For a non-alcoholic round, the Tow the Line combines orange, yuzu kosho, vanilla, coconut, and lime and sends $1 to Sophie's Neighborhood.
- Who will enjoy this place?
- Drinkers who want a full cocktail list rather than a single signature will find 14 cocktails and 8 martinis, including non-alcoholic options on both menus. The happy hour pricing at $9–$12 suits an early round, and the NA beer, kombucha, and botanical soda make the bar workable for a mixed group.
- When should I go?
- Happy hour is the value window, with the Siren Martini, Margarita Soda, Golden Bouy, Spa Water Cosmo, and Tow the Line at reduced prices from $9 to $12. The rest of the menu runs $10 to $16. The Ice Cream Float with draft root beer or Guinness is a dessert-order move.
- What should I expect to spend?
- Cocktails run $10 to $16, with happy hour drinks $9 to $12. The Siren Martini is $12 before the $10 caviar add; the Espresso Martini is $13, the Flip Ship $15, the Old Bae Old Fashioned $15, the Sea Smoke $14, and the Jungle Mai Tai $13. NA cocktails are $10 to $12, and NA beer, kombucha, and botanical soda are $6 to $8.
- What makes the beverage program distinctive?
- The non-alcoholic program is built into the main menus, not tacked on: two NA cocktails, one NA martini, and a separate run of NA beer, kombucha, and botanical soda. Tow the Line also donates $1 to Sophie's Neighborhood. The martini list reaches 8, and the Siren Martini can be ordered with a spoonful of caviar.
Beverage categories
We only score what a venue sets out to do. Categories a venue doesn't attempt are left unscored rather than penalized.
Cocktails
A 14-drink cocktail menu split into Fizzy, Juicy, and Boozy sections, plus 8 martinis. Named builds include the Siren Martini, Espresso Martini, Flip Ship, Old Bae Old Fashioned, Sea Smoke, Jungle Mai Tai, and Tow the Line. Happy hour reduces signature drinks, and non-alcoholic options appear on both the cocktail and martini menus.
Menu strengths
- — 14 cocktails across Fizzy, Juicy, and Boozy sections, plus 8 martinis, give the list real range.
- — Happy hour reduces the Siren Martini, Margarita Soda, Golden Bouy, Spa Water Cosmo, and Tow the Line to $9–$12.
- — Non-alcoholic cocktails appear on both the main cocktail menu and the martini menu.
Standout selections
- — Siren Martini: vodka, dry vermouth, gin, sherry, and bitters, with an optional $10 spoonful of caviar.
- — Espresso Martini: vodka, cold brew, coffee liqueur, grappa, and mascarpone creme, described by customers as a particular treat.
- — Flip Ship: blanc and dry vermouth, pear brandy, genepy, and lime leaf, noted as a favorite.
- — Old Bae Old Fashioned: bourbon, rhum, amaro, roasted coconut, and Old Bay bitters.
Pricing: $10–$16; happy hour $9–$12
Wine
House wine is poured by the glass in red, white, or rosé during happy hour at $9.
Menu strengths
- — House wine by the glass in red, white, or rosé covers the basic styles at happy hour.
- — The $9 happy hour price keeps wine in line with the reduced-price cocktail list.
Standout selections
- — Happy hour menu lists house wine by the glass in red, white, or rosé at $9.
Pricing: $9 by the glass at happy hour
Beer
Beer shows up at happy hour with Narragansett American Lager at $4 and on the food menu in an Ice Cream Float with draft root beer or Guinness at $11.
Menu strengths
- — Narragansett American Lager is a $4 happy hour pour.
- — The Ice Cream Float pairs draft root beer or Guinness with ice cream for $11.
Standout selections
- — Narragansett American Lager at $4 during happy hour.
- — Guinness as the stout option in the $11 Ice Cream Float.
Pricing: $4 Narragansett at happy hour; $11 Ice Cream Float
Nonalcoholic
The NA list is unusually broad for a bar: two non-alcoholic cocktails, one non-alcoholic martini, and a food-menu NA section with non-alcoholic pilsner and IPA, kombucha, and botanical soda. Tow the Line is also on happy hour at $9 and donates $1 to Sophie's Neighborhood.
Menu strengths
- — NA cocktails, an NA martini, NA beer, kombucha, and botanical soda cover several drinking formats.
- — Tow the Line appears on both the main cocktail menu and happy hour at $9.
- — Tow the Line sends $1 to Sophie's Neighborhood.
Standout selections
- — Tow the Line: orange, yuzu kosho, vanilla, coconut, and lime, with $1 donated to Sophie's Neighborhood.
- — Red Sky at Night: tomato, Thai basil, agave, and yuzu foam.
- — Mutiny Haven: verjus, peach, ginger, and NA aperitif.
- — Non-alcoholic pilsner and IPA at $8, plus kombucha and botanical soda at $6 each.
Pricing: NA cocktails $10–$12; NA beer, kombucha, botanical soda $6–$8
Spirits
The happy hour Tequila & Modelo combo pairs a Modelo Especial with a blanco tequila shot for $12.
Menu strengths
- — The happy hour Tequila & Modelo combo pairs a Modelo Especial with a blanco tequila shot for $12.
Standout selections
- — Tequila & Modelo: Modelo Especial and a blanco tequila shot, $12 at happy hour.
Pricing: $12 happy hour Tequila & Modelo combo
How it sits with the food
The food menu lists an Ice Cream Float with draft root beer or Guinness at $11, a dessert pairing that uses the beer list directly.
Inebrious does not score kitchens, food or the restaurant overall. We review the beverage program only.
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