You will enjoy these then:
Confessions of a Superhero - wannabe actors working on Hollywood streets as costumed superheroes for tips.
The Great Happiness Space - Japanese male prostitutes entertaining girls in pubs. Suprising twist in the end.
Indie Game The Movie, Comic-Con Episode IV: A Fan's Hope - titles say it all. I guess these two are well known around here, like King of Kong you mentioned.