Be wary of events where it's the women who stay seated and it's the men who switch seats:

http://faculty.wcas.northwestern.edu/eli-finkel/documents/RotationMS_FINAL.pdf

http://lesswrong.com/lw/127/an_interesting_speed_dating_study/

It doesn't result in a reversal of the normal results, exactly. Male sitters appear to be about as selective as female sitters, but male rotaters are much less selective than female rotaters.