A couple of notes on the CRC membership vs. Amex access;

I've seen Amex holders turned away from CRC when it's overcrowded and they were only letting in CRC members. Saw it twice in ATL last year when they had closed one for remodeling, the nearest one was SRO. Lots of angry Amexers that day.

CRC membership gets you in the elite security line. Could be wrong on this, but I think the Elite security lines are for GM and PM and F/BE only, not Silver.