Agree with the review above. Jamboree is definitely worth getting excited about. It was rumoured to have been closing down but recently secured the funds to stay open. Hooray!
You don't need to check what's on before you visit because chances are it'll be some intricate jazz/swing/folk band. It's a place where real music is played for people who appreciate that kind of thing.
Low-key underground music venue which promotes an alternative to the typical indie bands with slightly old-school folk, undertones of jazz and classical as well as modern drum n base, rock and techno putting in appearances. Expect both the live music and DJs to be exciting and different!