The art of getting a girl to grind with you is more important than the grinding itself. As a semi-frequent club-goer in the boston area, I've had the chance to observe a number of loser dudes try to dance with bangin' chicks. So let me give you bums a little lesson:
1.) Go to the dance with a lot of your homies. Like, 10. And slap each of their hands in rotation every few minutes. If you have a secret handshake, that's cool too. Bitches love that shit.
2.) Roll solo on the dance floor, or with one other dude. You're a predator, a wolf. But you need to wear sheep's clothing. There are a ton of creeps in the world, and the beautiful babies don't go for them. So get some nuts, stop clinging to your massive group of homies, and go out and scope some bitches.
3.) Choose the right group of bitches. Emphasis on group. The good ones always travel in packs of 2 or more. Look for the ones that are feeling vulnerable and self-conscious about their dancing. Go make them feel comfortable--and at the same time, dangerous, because you're a dark stranger. Also, look for chicks who are dancing really suggestively with other chicks. This tends to be high risk, high return, as this type of chick is usually smokin' and looking to get laid. However, there's a good chance she's a lesbian or better than you, and will blow you off publicly.
4.) When you spot your chick, you can employ one of two methods. The first is this... circle slowly, dancing subtly, letting her see you. Then disappear behind her, but so she can still see you in her peripheral vision if she turns her head slightly. slowly approach, and very gently start to dance behind her: don't just put your dick in her ass. Let her know you're there, and then see if she comes to you. This approach happens to be the most popular in clubs. It's also unsuccessful a lot of the times because the idiot dude gets too excited and just starts slamming every chick in the room on the back.
My preferred method is to find a girl, and then somehow loiter near her. It doesn't matter how: hold a drink, or chat with a wingman or whatever. Once she catches your eye, you wait a few seconds, and then you go over and tap her shoulder and offer your hand. She'll act surprised, but she'll almost always respond nicely to you, even if she's a huge bitch who can do way better than your sorry ass. this way, you hold her hand and dance apart for a few seconds, and then creep in a bit, dancing face-to-face and close with her. She'll eventually turn around and give you the ass if she likes you, and then later on, if you're still dancing, she'll turn around and give you the face again, which means she wants to get with you.
5.) Go for a smokin' baby only. Don't go for "decent." Pussies with small dicks go for "decent." Are you a pussy with a small dick?
6.) The actual dancing matters only to a point. Once she's yours, just smile and act really nice, but grind hard down below. Try to match her rhythm, not that of the music, because she's probably off herself but doesn't know it.
7.) Make out on the dance floor. Leads to bigger things. Seriously, just lock the whole kissing bit up while dancing. Even grab boob if you're getting that type of vibe.
Summary: sheep in a wolf's clothing. Make her feel safe, and yet in danger at the same time. Don't have a conscience, and get laid all the time, by all of the beautiful women in your city.
From the desk of Mr. S.S. Jibber