Rossmoor Flea Market vendors’ signup will begin on Thursday Signups to participate as a vendor at the Rossmoor Activities Council Flea Market will begin on Thursday, March 23 at 8 a.m. at the Recreation Department at Gateway. The Flea Market will be held on Saturday, April 29 from 9 a.m. to 2 p.m. in the Fireside Room, Oak Room and Peacock Plaza at Gateway. This event is for selling used