A fabulous and large hotel some lucky people stayed in during my second NSA convention in Riverside, California. I stayed at the functional but non-spectacular and much less expensive Holiday Inn which was under construction at the time!  My first convention I went to before I was actually a member of the NSA also in Riverside was in 1976 I believe.  I think this was taken with twin Mamiya C330 cameras. Fuji Velvia 50