On UA4196 (operated by ExpressJet, ORD-CLE) today, the FA was doing the beverage service and when she got to my seat she asked "Mr. LincolnJKC, Would you like your complimentary beer, wine or cocktail?" "No thank you, may I have a sprite please?" "Sure, anything else I can get you?"
I thought it was nice and discreet while being very hospitable and offering the benefit...
For the gentleman across the aisle from me "Would you like anything to drink?" "Did I hear beer and wine are complimentary?" "No, that's a benefit for our ultra frequent '1K' flyers..." followed by a short debate where he wasn't getting why he couldn't have the freebie. (I think she just gave up and comped it for him, which based on how long it was taking I was getting ready to just 'let him have mine" if it weren't for the fact my boss was seated immediately behind me...