Yes, I see how this can be creepy, but I also see how it can be cool. I go to bars to dance, but most people go to drink or cruise. It would be nice to know which girls are there to dance and what kind of dancing they do and even what kind of music they like. Then, when I hear a song I like, I check which girls like that kind of music and do that dance, say Salsa, and ask one to dance through the app. She probably would have already checked me out on the app and seen video of me dancing, so she knows I can dance and will likely say yes. Otherwise, I can quickly ask another girl through the app without having to walk all the way across the club to approach each one.