I used to be a manager at a night club and there was always a small cover charge. Lots of times it was just $5.00. To keep the riffraff out. It all went to the band playing that night unless it was a big name and they wouldn't work for the door.
I remember a guy coming to the door one night and said he had a group of 12 people that would like to come in for the "night" but they didn't want to pay the cover charge. Only $5 that night.
Of course without hesitation I said come on in. Even if they only bought one drink each it was worth having them in. They stayed all night and came back again and again. If they came in a group I would let them in for free. If they came like 1 couple they payed the cover without even asking.
On bigger name acts I would give them a break on the cover but not free. They were good with that too. Made lots of money off them.
I personally hate cover charges. I understand them in some circumstances but not a fan.
I hate tipping as well. I do tip and tip well, but tipping is something that just went wild at some point and businesses are laughing all the way to the bank. Better stop on that. Rubs me the wrong way.
And yet another thread goes off track. Sorry for my contribution to the wreck.