So i have experienced it lots of times already and tried changing my approach but still no help.
If there is a set of 2-3 girls just standing in the middle of the dance floor i would go in and say:
"hey girls, what you aren't good dancers that you stand here like this?"
they usually say: "we are tired"
me: "already, was it like one hour dance lol"
them: "we are really hot in here and we just need to cool down a bit"
me: "okay that cool, is she always that crazy like that?" (point on target)
they give each other a look like wtf and say "yeah i guess.. she is really fun"
me: "well the reason im asking is because she always answers my questions first and she is really sweaty which means she has been dancing like crazy"
them: "hmm.. hmm.. ok" (they turn around look at each other and i feel like boom done.)
sometimes i get something but 7/10 times i dont.
i use opinion opener sometime and they just give a quick opinion and thats it..
how to i keep them interested in what i have to say? like what should i talk about after the opinion and a bit of teasing?