Played a Boogie Woogie dance gig last night (four piece band - piano, drums, guitar and me on bass) with mostly mid-aged people coming to dance and have a good time. We played some slow ones, but also a lot of boogie and jive. We also did a short (intended to be) comedy intermission called the "All Wrong Boogie" - one or two verses of a regular boogie pattern, with all of us playing in different keys (Lead Guitar in E, Piano in B and bass in G). We started and to our surprise, the dance floor filled up immediately!
After stopping we asked the crowd if they noticed something special about this one and one lady replied "Yeah, it was too short."
Don't worry too much about rehearsing details of arrangements, breaks, endings etc....Most of the audience won't notice that you're in different keys...
Kind Regards, Walter