In my early 20s I worked in numerous strip clubs, both here in the UK and abroad.
Dont judge! 
I danced in some very high end places, and also some absolute shit holes. The men who came into the clubs were mostly there for a laugh. They just wanted to experience the place. I would say most were one time punters, almost always in a group. Guessing one suggested it and the others followed. I don't believe that any of the guys came in for anything sexual, they wern't walking around with a hard on. It was just the weirdness of being surrounded by "mostly" beautiful looking, but mostly naked women.
Some actually negotiated business deals there, some were regulars who just seemed to like the atmosphere.
The guys who paid for private dances were usually just embarrassed and would sort of gaze mindlessly at your tits. Don't know why but "crotch creeps" were rare.
I think the reason most women the clubs objectionable is because (and this may be a little controversial) they can't handle the idea of their partners being in the proximity of another naked woman. I guess if you're a bit out of shape, maybe lacking in confidence, you might feel unable to compete with the dancers and their "perfect" bodies.
People will say it's disrespectful and the guys are perverts
That is way too simplistic I think. There were a fair share of dickheads, but most of the guys were just looking for a bit of fun.
I think people need to get over the fact that men like to look at naked women. It's just biology. People act like it it's perverted, but then expect their partners to look at them and get horny
obviously men stop wanting to look at other women when they get into a relationship!.
The punters are just normal guys. Not perverts, not molesters. Just out for a drink and a bit of fun.
People need to lighten up. Trafficking and forced prostitution are another thing all together. You will rarely find any such abuse within mainstream clubs.