After Bebe initially arrives at Cafe Nervosa and speaks to Frasier, Niles introduces himself to her. However, they all attended the SeaBea Awards together as seen in Season 1 "And the Whimper Is..." (1994), so they should already be acquainted with each other. Response: They did recognize each other. Niles told Frasier that his agent was arriving at the cafe. Niles introduced himself as a humorous device because Bebe was ignoring him. Bebe recognized Niles as Frasier's brother.