The lounges are closed. My father (gold status) stayed at CC Gateway on 2 seperate weekends over the past month or so and reported that he only got coupons for the limited cold breakfast option. When I was there this past summer I got coupons for the whole buffet - so not sure if they changed the rules or just dumb luck.
The properties are caddie-corner from each other across Route 1. Very easy walk.
Check out the M11 - bonus buck rates. Gateway was $139 or so last weekend.
When the prices are similar - I'm a fan of the location & view of the JW Marriott since it's such an easy walk to the museums and metro. Plus the CL has pretty good evening grub.