Well, it depends on whether or not you want to make a living, Misty. If this is just a hobby, then of course you can be as fussy as you want. But if you want to get work back at the venue again, or get referred by the client, you have to deal with reality.
Reality is that you are a worker, just like the wait staff or the bartender, and you don’t have the rights of a guest. Sorry, but that’s just how it is.