Bait to get a chick to send a photo when you aren't sure which one she is

Hey guys. you guys usually have clever lines to play the social game (and win).

I'm looking for bait to text a girl that seems eager to meet up (suspicious) or my game was tight. My friends left the club area around the time I picked her up.

I need to get a photo of her. Ask to snapchat? Or is there any easier way to get a photo from a girl and how should i phrase it.

Thanks for the hand holding (on ritalin and thinking like a robot).