ctyhntr:
You bring up a very good point -- that %$#@! coin drop! The problem with games like 9.1 (and one pocket, like another poster brought up) on a bar table is that occasionally balls need to be spotted. I know when I play "spotted ball" games like 9.1 and One Pocket on a bar table, we use the extra six balls to spot with, since once you pocket a ball, you can't retrieve it out of the ball cage unless you pay again.
What I (and my friends) usually do, is slip the proprietor of the establishment a $10 spot (to cover the cost of an entire roll of quarters), and have him/her fetch the key and open-up the side of the bar table (ball cage) to us for the entire session. It's actually a VERY INEXPENSIVE way to go when you think about it -- the proprietor gets an entire roll of quarters worth of coin drop in one fell swoop, and *you* -- the player -- gets an open table where you can fetch balls out of the ball cage at will, for the duration of your session at the table (which could last a couple hours -- basically $5/hour on that table!).
NOTE: you can really only do this when the establishment is not busy, and there's no demand for the tables. You can't do this during peak hours, because obviously, patrons coming in wanting to play on the tables are going to approach the table, thinking it's a "public" table, and put his/her quarters up to "play the next game." You *might* get away with commandeering a table like this if the establishment has several tables, but again, not during peak hours.
Anyway, that's an idea that hopefully is useful to folks out there.
-Sean