Well from where I'm from, the girls are going in the club like its a political rally. Super pack or gang (mostly 4-5 or even more chicks ). I've had a few girls look at me because of my dancing and quite frankly, I'm not interested with trying to talk to one girl when she with her gang haha.
Furthermore, girls do pretend a lot that they have boyfriends because the guys dont know how to approach right... They patrol the club like goddamn vultures waiting for a prey... They don't talk and after a while ( or after liquid courage has destroy any effect of approach anxiety, they try to grind on a girl... Which 95% of the time, results in a rejection.
When it comes to DTF girls, in my opinion, there are the most quiet girls, they don't dress up too provocative but they are still look sexy. They will hangout at a bar alone or away from their friends, while looking at the dance floor and around.
Now I'm not saying that girls in groups are not DTF, but usually, they just wild out, drink and share "war stories" about how guys were trying to talk to them. At lease one girl in the group generally wants to talk to a guy or dance with a guy, but doesn't understand that she's €ockblocking herself by staying by her friends and moving with them at all times.
Whenever you approach them, they are willing to do whatever, drink some more and dance. They dance very sensual and after a few minutes of trance, they turn around and makeout with you. Bonus if you guys were dancing in the corner. She will then throw a token resistance so she doesn't feel like a slut: "I usually don't do this" I can't leave my friends" " I think you are really hot and that's why I'm doing this "
Once you kill that token defense, good stuff happen hahahaha