Give yourself a handful of chips to play with and make bets on whatever it is you want, a sports game, an upcoming TV show debut, even people watch and make your bets accordingly. Negotiate what constitutes a fair bet between you and debate results as a fun little competition for the two of you! Three options upon winning a bet, you either get your chips returned or get your chips back but doubled (2:1 betting) - just pick before the first bet is made. If you cannot afford a bet, the maximum amount you can afford will be placed, if you are completely tapped out then no bet will be created. bet on anything, A TV show, sports game, people watching...
Add a forfeit, such as little punishments or drinks, to allow for cancelling of lost bets as a little extra fun.
Your above settings will be locked in as soon as you place your first bet.