From It's All the Streets You Crossed Not So Long Ago:
HOTEL DIPLOMAT:108-116 W. 43rd Street, just west of 6th Avenue. Haven't located any historical details on the hotel itself, though it does apparently have a file at the New-York Historical Society. I gather the place had a rather, uh, diplomatic policy when it came to events bookings and clientele. At various times it played host to jazz performers (such as MilesDavis and Albert Ayler), salsa bands, Libertarian conferences, Chilean solidarity meetings, civil rights poets, Abbie Hoffman drug busts, artexhibitions, and drag balls. On motherboardsnyc.com, Hattie Hathawayremembers, "I was friendly with the desk clerk and took many johns there, though it was a fully operational normal hotel...There was even a fully operational coffee shop that included that archaic NYC phenomenon--the soda jerk--who made fierce cherry-lime rickies and egg creams. People would come from all over the city for them." A decadent-but-classydiscotheque called Le Jardin operated in the basement during the mid-'70s. But I'm most concerned with the rock shows held in the hotel's ballrooms, ca. '69-'79.