Great place for a chill evening with friends. The happy hour and nightly specials are pretty great ($3 pints all night on Mondays!). Food is standard/good bar fare, and they do have several vegetarian options. Fridays and Saturdays can get a bit loud and busy, but most other days it's pretty laid back. In warm weather the patio is perfect, though you are competing with the smokers for tables. Overall, Prosperity is a great place to hang if you're in the Tremont neighborhood.