Kim, Khloe & Kendall Who's Got the Better P p p poker face?!?

Kim, Khloe, and Kendall tried their hands at poker and were dealt a good time. Even better ... all for a GREAT cause.

The sisters -- along with momager Kris Jenner -- were the featured guests at this year's 'If Only' Texas Hold'Em Poker Tournament held Sunday at The Forum. The charity event aimed to raise money for cancer treatment and research benefiting the City of Hope.

As we reported ... tons of other celebs hosted tables at the event and some of the prizes included customized Callaway golf clubs and cool meet-and-greets.

Some of the celebs on hand ... Grammy winner Meghan Trainor, pro poker player Maria Ho, former UFC champ Tito Ortiz, "The Simpsons" executive producer James L. Brooks and more.

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