All an interesting discussion. But comes back to the question of how much you need a drink. If you want one, you are either going to meet the establishment's demands or you are going to drink alone somewhere.
The real question is not what the place collects but how they store the data, for how long and the measures taken to delete it.
Clearly they collect the data in case the cops come back, so the question is "when".
The bouncers won't know and whatever they do say isn't going to be reliable. So grin and bear it or don't.