In "Second Time Around" (in which is Fraiser and Lilith's lone date up to this point), Lilith walks out when her beeper goes off, ending the date. Here Fraiser reminds Lilith that she closed the car door on his hand during the date, and that was their lone physical contact.
When Cliff and Norm head out to attend the gladiator film festival, Norm says, "De gustibus non disputandum," an ancient Roman maxim that translates roughly as "there can be no quarrels in matters of taste." However, he quotes it wrong (he omits the verb). He should have properly quoted it as "De gustibus non disputandum est" or "De gustibus non est disputandum."
At 19 min, 51 sec, the camera can be seen in the right side of the frame as Frasier crosses the bar to talk with Lilith and he says "unprofessional attitude."
After the broadcast, Sam asks the bar for the box number. One of the patrons calls out the zip code instead.