The episode: “Catalina Caper,” ep. 204
The riff: Observed by Tom as tons and tons of young white kids dance and even more well-groomed white kids arrive to join the party.
The explanation: The National Front is a British political party marked by its racist nationalism, neo-nazism and “whites only” policy. It reached the height of its popularity in the late 1970s but was never a true player. It still exists today but has no candidates in office. Some consider other breakaway nationalistic groups such as the British National Party to be successors of the National Front.
Novelty factor: I’ve never heard of the party before but it’s pretty obvious from context (it comes right after an apartheid joke) what kind of organization it’s going to be.