BigGolem,
I should make clear that my issue is not with the venues themselves as much as what dates do at those venues. Theoretically, one could just walk around Chelsea Piers and have serious conversations without playing together. But normally the dates play together at these venues (and others) in order to have fun and laugh together; which is forbidden by Chazal.
I don’t think that most boys even know that this is problem. Very few Yeshiva bochurim have ever learned Even HaEzer 21:1 and/or realized that the girls they are dating have the status of arayos. Remember, they don’t usually learn hilchos niddah until after they are engaged.