It's a much rarer thing in the states to have an actual singalong in a bar. We had something going in Princeton NJ in the mid 80s that came darn close though...which generated some great 'krak' and made me look forward to monday nights. A bouzouki-playing physicist and a bones-playing pianist started a weekly 'Folk Showcase' at the Nassau Inn. Joan and Brad encouraged folks to sign up for 20-30 minute slots ahead of time (by phone). The only stipulation was that it be acoustic and folk-related. We all performed for fun; I think the organizers got a small stipend from the bar. But we gave the place some good business, and many of us would spend the whole evening there. I guess it boils down to having a venue that welcomes that sort of thing (Folkies in the states are generally NOT noted for prodigious consumption of alcoholic beverages), finding some inexpensive ways to publicize (weekly folk shows on the radio seemed to work for this venue), and being willing to stick it out until it becomes an expected and anticipated thing. Good luck with it, lad! It can be great fun!