Underbelly

Underbelly is a 21+ basement bar and venue at 119 1st Ave. S in Seattle’s underground. The setting gives the space a distinctly below-street character, while the offering combines drinks, pizza and event programming in one compact destination. It is designed for adults looking for a casual place to gather around food and drinks.

The drink list includes cocktails, natural wine and cold beer. That range gives the bar several different directions, from mixed drinks to wine-led visits and straightforward beer orders. The food offering centers on hot pizza, making Underbelly suitable for a drink paired with something warm and filling or a relaxed food stop within a night out.

Underbelly also functions as a venue, with a calendar of events and updates shared through its Instagram account, @underbellyofseattle. Events and specials are part of the venue’s character, so the experience can vary according to the calendar. The combination of a basement setting, bar service, pizza and programming creates a casual social atmosphere rather than a formal restaurant format.

The 21+ policy places Underbelly firmly in the adult nightlife category. It can suit friends arranging an evening around drinks and food, as well as adults interested in checking out an event in an underground space. The atmosphere is centered on the bar and venue format, with the food and drinks supporting time spent there rather than a broad full-service dining experience.

Underbelly’s location on 1st Avenue South makes it part of Seattle’s underground-oriented downtown bar scene. Its identity is straightforward: a basement venue with cocktails, natural wine, beer, hot pizza and events. Guests planning a visit can use the venue’s Instagram for current specials and event information, while the core offering remains consistent as an adult bar and pizza spot.