When I was growing up, a popular card game was Pontoon. This isn't either of the casino variants of 21 that go by that name, but a social game in which players act as dealer/banker. I haven't played it or seen it played in many years. (Andy, do you know if the game has died out throughout the UK?) I found a useful site describing the rules of lots of card games. The description of Pontoon matches my memory of how we played it - http://www.pagat.com/banking/pontoon.html It strikes me that it could be a good basis for a tournament, similar to the bounty blackjack formats that have been tried out in the past. Also, I wish I had known then what I know now, with regard to this aspect of the game - With a single deck, I'm wondering how often cards might actually circulate back to the top of the deck before a Pontoon triggers a reshuffle.