I have played at 4 separate pool halls, and all of them around here charge either $8-9 fees for per player per night. $6 of that goes to the APA, and the remainder are the in-house "green fees". All the venues have between 24-30 tables (mostly 9 footers), and the league size ranges from 9 teams on the slower Monday night league, to 16 teams per night on the busier night. Hard Times in Germantown actually has 30 teams on Thursday nights, but there are 3 separate leagues running that night, so it is around 10 teams per league.
We get "free" practice for an hour prior to league play, and Champions in Frederick sets up a free coffee/tea/water bar for us. That is all we get for free.
Venues: (all in Maryland)
Hagerstown Billiards, Hagerstown
All Star Billiards, Frederick
Champion Billiards, Frederick
Hard Times, Germantown
Joe