Originally Posted by
xliioper
Those sound pretty basic (no lawyers required). The DL Amex Reserve card has only ever worked with Delta Sky Clubs and has never provided access to partner lounges (years ago, an SC membership would get you in partner lounges, but not the Reserve card as it's only an "access" benefit). Also not sure why you thought a C+ seat alone would get you in (not even PS fares are eligible for lounge access on their own).
I had been in Air France and KLM lounges several times prior to this incident so she caught me off guard when she said I couldn't come in. Had she simply scanned my BP, there would have been immediate admittance. I wasn't anticipating or prepared for the challenge she gave me, lol. It's not that I thought those were basis for my access, it's just that in the moment I bumbled it.