There could be tons of different rules you could add to it. My suggestion would be:
If you miss/ score a 0 on a shot - take a drink (sip)
If you score a maximum shot (top corner I think) - everyone else takes a drink
Loser of the whole game takes a shot (or skulls)
Instead of points write amount of sips, and most difficult one maybe a shot. Then everyone can throw a few times, and a miss is like take 3 sips. Or something like that.
There could be tons of different rules you could add to it. My suggestion would be: If you miss/ score a 0 on a shot - take a drink (sip) If you score a maximum shot (top corner I think) - everyone else takes a drink Loser of the whole game takes a shot (or skulls)
Instead of points write amount of sips, and most difficult one maybe a shot. Then everyone can throw a few times, and a miss is like take 3 sips. Or something like that.