The situation here on the east coast of the US is the same as Slipin describes.

I would say you should have some covers rehearsed that will go over well with the crowd there. You may need to go a couple of nights to just scope things out to see what goes over well with the crowd. If you play something the crowd doesn't know, they are likely to lose interest. Same thing if it's a rhythm-n-blues type crowd and you play GnR. You want to try to engage the crowd. You are there to entertain them, not yourself.

Take it from me, it's a lot of fun to play music that you may not normally listen too. I'm going over my part for Gladys Kight's version of "heard it through the grapevine" and it is a blast to play, even though it's not a song I would play in my car on the way to work.

Good luck with it!!!