heres where the neg theory takes a huge shot in the foot.
You can't neg or use any 'value maniuplation' material on the dance floor. It's all conveyance.
On a side note, why I'm not the biggest fan of negs is it gives the PUA the mentality that he starts off 'low value' and has to 'knock women down a peg' while spiking himself up value-wise. Not only is this a weak Mindset to have, it's totally useless on the dance floor.
So, you must start out with a high self-value when going on that dance floor. You must think, feel, and believe that you're a fun person to dance with. I typically augment that by opening various sets before midnight. 10pm to midnight is a perfect window for you to open set after set, and leave those sets when youre at a conversational high point. That way, you don't stay too long, dillute your set, and the next time they see you (at around midnight), you're not as appealing or high value.
So first things first, get there fairly early and open those sets. When you feel the conversation's at a sweet spot, excuse yourself, "well I gotta head back to my friends, but I'll see you guys around here." or "...when i get back, we'll hit up that dance floor" then you leave, open another set, rince and repeat until midnight.
At midnight, if the DJ of the club is good, the music changes from 'lounging' 'ok' music, to crowd pumping music, typically hip-hop, dance remixes, and top 40 stuff. Take a listen to the song, then look out to the club. Are girls getting energetic? If they are, this is where you come in.
When approaching girls on the dance floor, keep in mind these cardinal rules:
1) You must match the energy of the music, or slightly higher. Don't go in all half assed
2) Match the energy of the girls or slightly higher. Once again, no half ass attempts. I'd rather go in ONCE at 100% effort, than a number of 50%s
3) They must see you approach! No back grinding. Best approach angle for me is the 45 degree angle. Not directly back or directly in front.
4) Learn how to spin a girl. Learn how to strongly and confidently hold your hand out to hers, and when she takes it, raise her hand, turn her wrist, and spin her. That's your opener. Spin, and you're in.
Remember to always be the leader, always be the person leading the girl. Give her little leads to have her follow (hoops for her to jump through). some leads are more spins, pulling back and curling your hand in a 'come here' motion, etc.
Once you think you've reached a very good high point on the dance floor, right before you two are tiring out, that's when you lead the interaction OFF the dance floor, "hey, let's get a drink" "let's sit down." "i don't know a thing about you, how about a break and we can talk?"
From there, hopefully you know what to do.
Let me know if you have any questions, and try it out. let me know how it goes.
good luck