So I have the Amex platnium card which grants access to most airline clubs other than United. I also travel quite a bit on the Amtrak Acela . . . and Amtrak Guest rewards Select Executive members (and maybe some other membership levels) are supposed to be accorded access to United lounges - and United Club members are allowed access to the Acela lounges. I've encountered raised eyebrows before from United Club attendants unfamiliar with Amtrak Select Executive cards, but when they swipe the cards - everywhere other than Dulles (IAD), they apologize for the inconvenience and let me in. I have frequently encountered problems at Dulles. Especially when traveling with my family. The Program guidelines provide that the card provides access for myself and (1) one guest OR (2) my spouse and minor children. Twice I have been turned away from the Red Carpet Lounge at Dulles. Once when traveling with a couple of my minor children, I was told that I could only bring one as a "guest" and would have to leave the other outside (leave a minor outside at an airport? really?). And most recently, on Christmas day "Polly" at the red carpet club at IAD told me that I could either bring in my minor children OR my spouse, but not both. (We were also traveling with an au pair, and I volunteered that I would use a day pass for the au pair, no problem), Polly explained that I would have to buy another day pass for my husband if I wanted him to enter with us. Again, leave my spouse standing outside on Christmas day -- really? We declined to enter. I emailed Amtrak guest rewards and was told that they apologized for the inconvenience, but my understanding of the rules was correct, and my spouse and minor children should have been admitted. Doesn't do us much good now. Anyone else have issues with this?