Searching for the Seventies

Preceding back in time (v.i.), you have till Sunday to catch the Documerica Photography Project at the National Archives. Maybe a hundred photos from 1972-1977. Guess how many gay photos there are? Well, none, explicitly. But consider:

Can anyone do the Hustle?  Here's the caption:

Chicano teenager in El Paso's second ward. A classic barrio which is slowly giving way to urban renewal.

See if you can spot the two guys in the background who are about to not so slowly be doing a little "urban renewal."