[71jasper]

Given the sheer number of possible requests, it's a good idea for any gigging musician to have a beg-off strategy. My standard joke is "If I could play that what would I be doing here?" Or I say, no but that's a good suggestion." Whatever you do, don't insult the requester's taste in music or the fact that he's requesting outside of your obvious genre.

As for filling in, give me a week and whatever materials you have, and I'll make the gig. At the very least I need a set list and keys. I've done it before. It's fun.