Chess drinking game??

First off I'm not joking.

I have a few friends of varying degrees of chess ability. Its tough to
get them to WANT to play chess, mostly because they dont want to get
wacked off the board. The weaker friends won't hear of taking material
odds, but they all like to drink. I figure that if I could introduce
beer or shots of whatever into the rules of the game it would make it
more attractive to the dissenters. For whatever reason people dont
mind losing at cards as much if the penalty is having to drink, so why
not apply this to chess as well?  Here is my idea, suggestions and
criticisms would be nice

My (not great) ideas so far:
1) If you have a piece or pawn captured you have to drink one drink
for each pawn value of the captured piece. Using standard piece
values: Q=9, R=5, N=3, B=3, P=1.
2) Being checkmated or resigning will cost you 15 drinks.
These are the foundation for all the other rules.
(The problem with leaving only those 2 rules is that the lesser the
player, the drunker he'll get, and play progressively worse....)
3) The winner of a game has half of the original drink
penalties(truncating away fractions) added to his current drink
penalties(except checkmate/resignation) for every consecutive win.
(Ex. If I have won two games in a row in my third game a queen
exchange would cost me 17 drinks, pawns 1, knights/bishops 5, rook 9).

I would say off hand that a drink would either consist of a drink of
beer, and for shots it would have to be some fraction somewhere
between 1/6 and 1/15 and you'd take a shot every time you had
accumulated one whole.

This would probably alter play for the guy on a winning streak, or the
guy who wants to make the guy on a winning streak drink a ton. It
could result in the player on a winning streak trying to protect his
queen more than his king...  That could be fixed by also increasing
the cost of losing though.

Any suggestions?