I've found you've got to be careful with the dancing/boning comparison.
If the girl is with a group of her friends and its ladies night or whatever, they usually have the confidence to let go and dance like a rockstar. This is in no way you can guarantee that your drunk *** will make her feel good enough to come alive between the sheets. Thats my experience.
On the flip side, if she's dancing with you and feels confident enough to really let go, then she feels way to secure and needs to be taken down a notch before she goes home with somebody else. Thats my experience.
I'm a fan of finding the slightly shy girl who is a bit scared to dance but is a closet republican who hates her father and wants to go to pound-town before last call. She's happy to drive there. Thats my experience.