You need one wingman or just find a random guy near her that less attractive than you. Say "Listen, my friend/that guy (wingman or random less attractive guy), thought you were really cute but hes to scared to approach you so I wanted to make him a bit jealous. lets dance." Worked 5 times in one night. About 75% success rate depending on the girl. Key is grabbing her hand and leaning in while tell her this and keeping strong eye contact after saying lets dance. Easy to transition to the basics, throw in a bit of neg(Your dance moves are nothin to be jealous of tho laugh it off). Try it out, lemme hear what you guys think.

Are you letting this random guy know that you're completely throwing him under the bus?!

Chances are he wont go after the same girl in a bigger club.

Well you said a random guy near her. Unless he's got his back turned, he may spot you guys pointing at him and snickering. If that was me I'd come over there and your game would then be totally busted or I'd confront you depending if I was all roided out. LOL

hahah thats a risk you gotta take. but it works, just dont be pointing at the guy or anything. this line makes it seem like you just wanna dance/talk for a bit and your not that interested, making the girl want to work to make you more interested, not just getting the other guy jealous. It has backfired once or twice but try it out. just dont pick some huge ass dude haha