This film or show by Roman Polanski has come up 2 times on Joe Rogan. 2 of those mentions were genuine on-air recommendations, not just passing references. The people who brought it up: Jon Peters, Sam Morrill. Every occurrence below links to the episode page and to the exact second it was said on YouTube.
Every time it came up
Joe Rogan Experience #1871 - Jon Peters
“watch Chinatown yeah I watch time I do I love amazing I know like that guy of course he's crazy”— Jon Peters
The guest here is Jon Peters: Film producer (Batman, A Star Is Born, Caddyshack) and former celebrity hairdresser turned mogul; lifelong UFC superfan who trained with the Gracies. Legendary Hollywood producer Jon Peters tells Joe Rogan wild stories from hairdresser-to-mogul, plus deep UFC fandom and old-school fight memories.
Joe Rogan Experience #1868 - Sam Morrill
“you think of like the greatest chinatown is one of the greatest movies ever fantastic movie”— Sam Morrill
The guest here is Sam Morrill: New York stand-up comedian and Comedy Cellar regular known for prolific output, with a Netflix special 'Same Time Tomorrow.'. Comedian Sam Morrill and Joe Rogan swap road-comedy war stories, riff on classic films, and talk drugs, gambling, and Anthony Bourdain.
