I'll be running The Enemy Within campaign soon under the Warhammer Roleplay second edition ruleset.
I'm taking my group all the way from Mistaken Identity to Power Behind the Throne (and possibly Empire in Chaos).
Since my party will be spending lots of evenings in tavers and inns I'm looking for some intersting games they can play/bet on.
Most suggestions I found say to just roll a D100 and the highest wins, but I find that a tad boring.

I was thinking along the line of a dice version of Blackjack.
Everybody rolls a D20 in secret and a D6 is rolled open on the table. Players can then place bets and the closest to 21 wins.
In case of a tie, the money is split.

Of course this is just an example. Feel free to add your own suggestions.