Was it usually held in New York? I think it was held in Chicago once, and consistently in Las Vegas since 1999.
Not during Dorian's time, but it was held on the east coast of America quite a bit during the 90's. And Dorian certainly was friendly with Weinberger. If you look at a lot of his American photo shoots on the east coast, they'd be at Bev Francis's Gym or Gold's Syosset. Bev is Steve Weinberger's wife.
Lot's of top guys knew Steve and Bev, but Dorian was extra buddy buddy.