There's actually two (and possibly three) games called Quest for Orgy. The one you downloaded is called "So You Want To Be A Porn Star" and indeed contains only one room and a rather lame joke. The real game that most people are talking about is "Sodom, Graham and Gomorra" and contains about a dozen different rooms, and some different lame jokes. There exists also a third subtitle which could either be SG&G again or yet another game, I'm not entirely sure.
The game is not particularly easy to find and not particularly worth playing (and, despite the name, it has less sexual content than your average larry game, in case you were wondering).
The game is not particularly easy to find and not particularly worth playing (and, despite the name, it has less sexual content than your average larry game, in case you were wondering).