From an email today: "We want to inform you that effective August 1, 2012, United ClubSM will accept only credit and debit cards as forms of payment for premium liquors and fine wines. Visa®, MasterCard®, American Express® and Discover® cards will all be accepted for these purchases. In addition to premium bar service, United Club offers select complimentary beverages, as well as light snacks, high-speed wireless Internet access and more. Thank you for being a United Club member." I can't imagine the bartenders are very happy given that no cash out/change will probably lead to a reduction in tips. I get not having cash on planes but this is getting ridiculous.