In my experience crotch holding is rare, at least in public, but pee-dancing is very common. But then I work shifts in an office that overlooks a city centre bus station and occasional taxi pick-up area. In fact I would say that after about 11pm on Friday ans Saturday nights in a town centre you would not have to wait long to see various stages of pee dance. The most frequent would seem to be one or two women in a group. The larger the group, the more likely it is to contain a pee-dancer, not just because of the law of averages, but because the group is less likely to do what a minority want, and if that minority want to pee and the others dont...well...tough. There does seem to be a bias towards mixed groups, because the women are torn between being chatted up and emtying their bladder, and if they fancy one of the blokes then the bladder takes second place until absolutely necessary. So the pee dancing becomes more and more exagerrated.
I have seen very isolated crotch holding incidents which I have posted on here, but there are quite a few times where pee-dancing women seem to suddenly realise their hand is drifting in that direction almost involuntarily and move it away again.
The interesting thing for me is that all this public stuff was quite erotic a few years back, until I found Skys video clips, and webcam highlights, but now it all seems rather tedious, because at least on this site I know the models have full bladders and within a few minutes I can witness just how full they were. Nowadays, the pee-dancers in the street are tame by comparison.
My blood pressure is SKY high.
(I really have eaten all the pies)