It is mentioned that Sgt. David Gabriel is trying to become a Detective Sergeant. Currently, there is no such rank in the LAPD. The Detective title is followed by a number, either 1, 2, or 3. Police Detective 2 is a supervisory position equal in pay to that of Police Sergeant 1 according to the LAPD career ladder.
It is pretty typical for the dances described in this episode as "gay raves" have name that winds up being a play on words of the city hosting the event like "He'll-A" (L.A.), "Hotlanta" (Atlanta), and do on.