Last call to urban bicycling and " farming" enthusiasts. Atlanta Councilman Aaron Watson and the Atlanta Bicycle Coalition are inviting Atlantans on a round-trip 10-mile bike ride Saturday. It is the final ride in the " Living Smarter through Cycling Series" the councilman has been peddling. The ride starts at Piedmont Park Conservancy Community Center and ends at the Brown Middle School Community Garden in West End. The garden is one of the Patchwork City Farms, which advocates urban growing and healthier living. Begin at 8 a.m. and ends at noon. Information and registration at www.atlantapost2/rides