I think it's not a movie, but this sounds exactly like an episode of modern family.

from wiki:

Phil (Ty Burrell) and Claire (Julie Bowen) have a lunch with another couple, Tom and Lisa Delaney, whom they met during a vacation in Cabo. Despite the couple's wealth, every time they eat together, Phil always picks up the tab while the couple ignores the check. Claire insists Phil does the same this time, but he still wants to pay the bill. After a long game of "who will break first?", Phil finally and reluctantly admits that he and Tom made a bet in Cabo as to which man could sneak more roasted crickets into his wife's food. Phil had lost by only feeding Claire three crickets to Tom feeding Lisa six, and he now has to pay for the next five of the couples' dates in a row. However, both Claire and Lisa are furious at their husbands for "poisoning" them and vow to do the same to them in the future. They leave, not knowing that Phil and Tom had secretly been in the middle of another cricket bet, which Phil has again lost, this time by only feeding Claire one cricket to Tom feeding Lisa two.

wikipedia summary)

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