You beat me to this one
As a general rule, I've found that the FS Marriotts don't offer this amenity but there are some properties in the U.S. and Canada that do. Those may be non-corporate hotels but, as I mentioned in my previous post, when I find them I make a note to myself to visit that property again if I'm in the area since this is a nice to have on the weekends when most of the lounges are closed.
Or you could check out the exec lounge sticky on which lounges are open/closed on the weekend & if brekkie coupons are provided when closed
http://www.flyertalk.com/forum/13849211-post1.html
Cheers.