For fun.
It is called teasing, look it up
Once a friend told me that she feels excited and hot when she touches a guy in a club. So by groping him, they feel hotter, they feel like they have more power over you.
The way to escalate in this case wouldn't be to start gaming her like you usually do, she will know that you are hitting on her, and will be disinterested. Just give her eye contact and a smile, maybe throw her a neg ( " I usually let only cute girls touch me like that ... ") , and then continue doing whatever you are doing (best dancing with another girl).
Then:
1)Slowly turn around and start dancing with her,while slowly isolating her from her friends (cut the off with your back slowly, get another couple in between)
2) Escalate kino
3) Triangular look (left eye,right eye,mouth) few times
4) "Lock" her with your hands on her hips, escalate kino even more
5) Triangular look again (builds up sexual tension,increases her BT)
6) Kiss her
7) Isolate, do whatever you want...
Kino escalation is
THE game with that kind of girls, you even don't need to speak...
Just remember to do all this
WHILE dancing, go
smooth and slow with your moves, don't just suddenly turn around or touch her. Smoothly and slowly...