Another time we were booked in a pub at McGill University in Montreal on a Saturday night. After waiting for the hockey game on TV to finish, (this is Canada after all), we started our act. About half way through our first set, a guy in the audience yells out "Hey, put on some dance music!". At the break the pub manager admitted he mis-booked us and told us not to worry about finishing the night (he did pay us in full though!).
But from a personal standpoint, the strangest experience was playing a bonspiel with the Worms. For those who may not know, a bonspiel is a curling tournament, which usually ends up in a bunch of folks sitting around a lounge drinking beer. I used to do a number called "Miss Texas" where I sang about my love for a mythical beauty queen in a tortured strangled voice - it was pretty funny, but very hard on my vocal chords. We ended up getting called back for an encore and we asked the audience which song they'd like to hear again (we were a bit short on material), and of course they chose.... "Miss Texas". Having a bunch of half-looped curlers cheer me on while I shredded my voice was a bit surreal to say the least!
