Wait a minute - does this even make sense? You really think the audience cares that you're not pro and you're only doing it for fun? If you're doing it for fun at a bar is the bar owner OK with not having anyone buy drinks?
I argue that whenever you go out to entertain people, you are working. They don't care that you're not getting paid or just doing it for fun. Unless this is some backyard BBQ with family and friends, you work it and entertain your audience. Ever wonder how bands go from "not making money" to "making money"? It's all on how you were perceived at the last gig. If you were playing stuff nobody wanted to hear at your last gig and turned off the audience that was there, word travels. Faster moreso now in the days of the internets.
So I see this as a two-pronged attack: 1) Play what they want and 2) appear to enjoy it. Glenn Frey once said in an interview how much he hated singing "Take it Easy", but he keeps doing it and enjoying it. Randy Meisner, the first Eagle's bass player, complained about having to sing "Take it to the limit" every night and refused to sing it after a time. There's reason Randy is no longer in the biggest band of the century.
Sorry to sound so stringent on it, but if you want to get to the next level, you gotta mentally go there first. It doesn't happen if you don't do it.
I think the more popular are as a band and the bigger following you generate, the more likely audience members and venue owners will be accommodating if you want to do something a 'little outside' the usual entertainment, but I think even that's a stretch. I was in trio once where we played the hits, but we tended to make the music our own and extend and stretch out a bit within it, and even that was treading on some toes.
Of course, if your plan is to play just what you want to play and there are no compromises, that's cool. Just understand you are in a "feast or famine" situation at that point. And if you're ok with that, you're good! Maybe I was too busy learning how to play anything I can so I can go out to play?
Errr....yes, it makes perfect sense. Just cos it is not in line with what you think or what happens in your neck of the woods douse not make it wrong. We play the stuff we love to play and think it will also be fairly commercial, and it works. We get as many gigs as any other local band but refuse to go down the blindingly obvious route that 90% of the others do. Thats why we get so many gigs, cos we dont do the obvious we do dancey funky stuff that is interesting to play, and listen or dance to.
If it was a "Job" I would play anything to make money. I dont, I have a job that I don't particularly like but It pays great money and it allows me to indulge in music, that I do love. Thats probably the position most of us are in,