Card games caches in the area that qualify are:
Authors, Old Maid, Crazy 8's, Snap, Animal Rummy, Hearts, Go Fish, Phase 10, Skip-Bo, Solitare, Pitch, Bridge, Canasta, War, Rook, FreeCell, Slap Jack, and Apples to Apples.
Other Card Games, you will need to check these sites for other possible names. Traditional multi-player card games http://www.pagat.com/alpha/#24_2_D Commercial games http://www.pagat.com/com/ "if it is on this list it will likely be OK as long as it isn't one of those converted board games" but to be sure, ask first. Others yet you might find as a cache name- Dehla Pakad, a nice indian game for 4. Doppelkopf, a German game. also, Boonaken, Go Stop, Mus, Bagchen, Skatis another German game.
"If is on the card game site is will likely be OK but if you want, you can ask about a specific cache before you go find them. That may save you some time in the end. "
Cache placed as part of the Jesse James Cache Bash 6 games. Cache placed with permission of business owner, Thanks.