Teorema except "the stranger" character doesn't end up seducing the dad and the son as well.
The satirical element specifically shining a light on rich people living in Beverly Hills mansions in the 80s worked for me. I thought the cast were able to do a decent job. Nolte/Midler/Dreyfuss keep the movie together. I thought there were decent comedic moments such as Little Richard performing at the party while chaos happens around him during the climax. That was great.
I feel like this probably deserves a 2.5, but my attraction to Richard Dreyfuss in this film may have influenced my rating, if I'm being honest.