The Book of Just a Little Lovin' (2013 Denmark Run) (2013)

From the introduction:

First of all, JaLL is a 5-day larp experience for approx. 70 players about friendship, desire and the fear of death. It’s been hyped and talked of as a larp about homosexuals, but even though quite a few of the characters have unusual sexualities, it’s really an oversimplification to say that Just a Little Lovin’ is a gay larp.
...
The larp takes place during three consecutive 4th of July parties in 1982, 1983 and 1984. Present at these parties are two circles of people; one consists of members of the gay community around Greenwich Village and the other of cancer survivors and friends. These two groups intermingle and are connected in various ways, but they represent the two main groups of the larp.

And they know how to party!