The Powerstation Studios are in 441, West 53rd Street. There isn't any sign on the house anymore and you have to note the adress to find it. When I was there I had to call to Germany that someone gives me the adress because I didn't know it anymore and no one, even not at NBC which is in the same street, could tell me where the Powerstation Studios are.
Another place is the Brooklyn Bridge where parts of the KTF-Video were shot. I think the Table Dance Bar from Jon's Queen of New Orleans-video is also in NY but I don't know where.
As far as I know a guitar of Richie or Jon (not sure here) is hanging in the Hard Rock Cafe.
Don't know any other BJ-related places in NY though, esp. not bars where they could hang around.
I think the most important BJ-related place is the Powerstation Studios. I mean, there everything started

.