Barney's Bro-Mitzvah Absolute Requirements are: booze, cigars, strippers, fear for our lives, mind-blowing entertainment, karate kid appearance, "alone time" for me during the strip show, tell crazy sex stories, spontaneous decision we regret, spend way too much money ($$$), lose a bro at some point, at least one real moment between bros, and see a girl fight one of these requirements actually occur with the appearance of the karate kid
The "Chinese Mobster" is played by Calvin Jung who appeared as Minh, one of Boddicker's henchmen, in "Robocop" (1987). Ray Wise, who plays Robin Sherbatsky's father in the series, played another of Boddicker's thugs, Leon.