The Choirboys is flat-out one of my all-time favorite movies!!! I have read the list of reviews here, and the positive ones are more insightful than most of the negative reviews, which consist mainly of "moronic," "insulting," "an outrage," ... blah, blah, blah (or more precisely "wah, wah, wah").
Don't listen to them -- this is an EXCELLENT movie. Mind you, it won't win any academy awards, but the cast is a who's who of Hollywood superstars. But, of course, they weren't stars when this movie was made -- they were really just breaking into the business, for the most part. Heck, James Woods alone is worth the price of admission!! And do keep in mind that this movie was made 30 years ago -- the cinematography and over-all feel is kind of dark, although there are some hilarious scenes! And I do not apologize for any part of this movie -- of all "police comedies" it is by far the most "real," in that I can imagine very easily a department EXACTLY like the one depicted. (In fact, I MISS the days when cops were REAL PEOPLE -- and not a bunch of ex-Marine Drill Instructors akin to Robocops (no offense to The Marines -- but you know what I mean, don't you?).
Choir Practice, in the movie, is, of course, the weekly drinking fest where the boys (and girls) blow off steam. And typical of 70's movies, there is more than one story going on at the same time -- and a good deal of time is spent developing the array of characters, all with stories of their own.
I like this movie -- and if you like Dirty Harry and think he is AWESOME for KICKING ASS, if you think this world has gotten WAY TO PC for comfort, if you like to party and make no excuses for it -- then you will like this movie, too!