I've been a few times, and it's been a mixed bag. I've had some nice friendly experiences and some that seem super standoffish. I think day and time are the biggest factor.
I have had some that grabbed my hands and moved them, and then told me not to touch them where they had placed my hands.
I have also had some who are really cool to hang with for a few dances. The first dance is generally where it has become apparent.
