Ever played Kings? Ring Of Fire? Master Of Thumbs? Sevens? 
My friends and I often played those games. One night, after a few too many hours and beers playing these games we came up with the idea of making a pack of cards which could incorporate all these games into one, and could be played by any number of people. And so, GROG was born. 
GROG is a pack of specifically designed cards, easy to read and easy to follow. You just lay the cards around a glass, face down, and start. The person who turns over the last GROG card gets to down a full glass. 
Please visit and check it out.
(Thanks Peter!)