Well you’re going to a strip club where you watch dancers and they’re providing you a service. It’s really bad etiquette to sit and watch for a long time considering that they’re paying to be there and if no one ever tipped then they’d basically be spending their money to be stared at all night, and stripping would cease to exist. No one is paying these girls besides the customers. And in a lot of states (including my own) waiters and waitresses make close to $3 an hour paid by the restaurant and live off the tips to make minimum wage.
If you’re gonna go to a strip club just to drink, that’s one thing. It’s something else to sit there and watch girls dance all night without offering a tip, you’re basically having them pay someone else so that you can watch them for free.