Checking the Marriott site today (Wednesday 9/29) the Courtyard, SF is listed as a cat 5, Courtyard and RI Oyster Point are cat 4, Full service SFO airport and San Mateo are cat 4, Courtyard Larkspur Landing (across the GG Bridge, right on the ferry line to SF, a nice property) is a cat 4, as are the two Walnut Creek properities.
Bruce