I used Cubicles, but it hasn’t been open so long, so I used the library before that. Even once it opened, there were times when I needed internet and it was closed so I had to go to the library.
I used Cubicles a lot, and there weren’t so many people there. I often had the room to myself and it rarely happened that there weren’t enough computers.
I don’t know who most of the men were there, but from conversations I overheard, I think some of them (if not all) were baalei batim who were there for work purposes.
They only opened it up for people who need it for purposes such as work. Their point was not to encourage people to use internet who would not be using it otherwise, so if they saw that it was mainly being used by Yeshiva bochurim, they would have closed it down. (actually I don’t think I ever saw any Yeshiva bocurim there except once when someone came with his sisters to sign up for HUD and he needed my help because he didn’t know much about computers).
In any case, their computers are very well filtered and they are not being used for anything inappropriate.