It's quite flattering to be asked to do a specific song, but I sometimes refuse because I can't be sure I'll remember all the words. I have a big repertoire of songs and there are an awful lot that I almost know but would need to skim quickly through the words of before singing. Before a club evening, I'll have half a dozen songs ready (to allow for some flexibility) but if I'm asked for one I haven't done for a while, I may have to say "Sorry, next time!", to give me time to revise it.

Marje