No. I don't believe there are decent girls in clubs.
Why do I think this?
A "Decent" girl, by my definition, is focused on her grades in school, and her job, and her hobbies. She has a social group already, within that school, within that job, and with the people that share her hobbies. When she is single, it is likely by choice. She'll have someone in her social group that she can date, there's no need to go to a club.
Sure, there are "exceptions" to this. It's not a rule, but a general trend.
A decent girl might go to a club once, just because she wants to see what it's like. She will probably not like it much, and never go again. She might go for a special event with a few of her female friends, but not really because it's where she wants to be. She might have just moved to a new town, and doesn't have a social group yet, and wants to start meeting people.
Any girl that frequently goes to the club, dresses like trash, and acts like trash? Not a decent girl. A lady wouldn't cheapen herself to dress like trash and let a random guy feel her up or kiss her or rub herself all over some random guy.
If she's doing it for EVERYONE, she's not special.