Mark Cohen's the only character with no partner (Maureen's already his ex at the start of the film), and no aids. The main conflict he had to deal with was himself. If he continued to do what we wanted to do, which was to make films, he wouldn't earn money (thus he became conflicted with himself, and felt like he was "selling-out" when he went to work for a tv company). The film's message or purpose was to show the life of a person with aids living in nyc, and it mostly contained his friends (most of which had aids). He wanted to send a message with his work, even if it didn't gain him money or fame.

@@nights.omitted and quite frankly at least in the movie version exploiting the people with issues and homeless by using them and filming them without their permission He's even called out in it in the movie by a homeless lady

David Heeney at 1:04 you can see what look like regular door hinges welded to the metal structure of the chair. And also welded to the seat portion. So in response to your question. I would imagine that regular old heavy duty door hinges were used. And from experience, I have a working stage used Sweeney chair too. And it uses regular old door hinges to drop the seat.