The term B-girl is used a number of times. In the U.S., the term B-girl (an abbreviation of bar girl) is commonly understood to mean a woman who is paid to converse with male patrons at a bar and encourage them to buy her drinks. The B-girl is usually served watered-down or non-alcoholic drinks to minimize both the effects of the alcohol and the cost to the bar.
Jed Allen's second appearance on Adam-12, but first time as an Officer.
390 = drunk.
IAD = Internal Affairs Division.
Dicks is slang for detectives.