In the military, in between ops, better than yuker [or whatever that game was!]. Many times we had to play for rounds rather than money, since much of the time we only had what was in our survival packs. We used 5.56mm[$0.05], 7.62mm[$0.10], .45cal[$0.25], 9mm[$0.50], .302[$1], and sometimes .50cal[$5] rounds as chips. Obviously not high stakes poker! Needless to say, splashing the pot or tossing your rounds in was not a good idea! But, we never had an incident, and it did pass the time while waiting for another op.