If you are a member of the Musicians union, (assuming you can read transcribes)
MOM pulls $750 to $900 per serivce for audience of 1,000
MOM pulls $1,000 to $1,500 per service for Audience of 1,000 plus
Drummer, keyboard, etc.. usually get a flat fee of $200.00 - $250.00 per service (union or non-union)
Here's the discrepency (non-union, that is, can't read and play by hear, which is clearly the best musicians in my opinion) is paid about 2/3 of the above.
This does not include rehearsal, expenses, and room/board.
Above is based on New York Musician Market/Entertainment .
-Big_Al