Two friends, Ann and Mary, are having margaritas at happy ho…

Two friends, Ann and Mary, are having margaritas at happy hour. There had been no discussion of who would pay for the drinks. After the third round of drinks, Ann said, “I will pay for everything tonight including your drinks.” A couple of minutes later, Ann says, “I’ve changed my mind. I just remembered that they might be having layoffs at my job tomorrow.” Mary wants to force Ann to perform on her promise and threatens to sue. In this circumstance, a court would: