Ignore Gargoyle, it is the height of bad manners to be invited to do a particular gig and not learn at least one set of music connected with the gig. Having said that, you can get away with a lot of ordinary polkas if you put lots of bass oomp pa pa on it. However, if you play them early on when people are sober and recognise them, you can earn brownie points, and then do them again later when they will be momentarily distracted by amounts of alcholic beverages....

LTS