Signed up for dancing. How to understand that a girl likes you? ⇐ Pick Up

[Anonymous]

I decided to sign up for dancing (salsa)
There are a lot of girls in my classes with whom I dance in pairs. How to understand that girls like you? I invited one to an individual rehearsal. How to proceed? Is it possible to kiss while dancing?
I’m just afraid that one will go away, and the second one will spread around the dance school. Will have to change..
I can't act slowly anymore. Time is running out. It's been so long without a girlfriend