Strip Club Tipping Etiquette

Now, I know that a lot of you guys are strip club veterans. You know a thing or two when it comes to the dynamic of a strip club. This is the exact reason I want to pose this question: Why in the hell do some gentlemen find it perfectly acceptable to NOT TIP while sitting at the TIP RAIL? We're providing a service and are generally not paid hourly. I hardly feel like getting a nice view of pussy isn't worth a damn dollar. Honestly, if you like us you should tip right? Especially during day shift, that's how we decide who to approach. The stage set is our form of advertisement isn't it? I don't know, but I feel as though a customer's inability to tip does everyone a disservice. We're in it for the money, you're in it for the fun...so what's the problem?