I live in Tamarac and work in Plantation. My only GPS at the moment is my cell phone's AGPS, but that plus Google Maps should be good enough for urban/suburban geohashing.
Palm Beach Graticule
2008-10-18_26_-80: Next to a corner house (on or near the sidewalk) in Pembroke Pines, near Flamingo Rd. and Taft St.
2009-06-12_26_-80: On a front lawn of a house in Sunrise, very close to the house where I grew up. This was also my first geohash that was not on a Saturday.
2009-10-03_26_-80: At a car dealership in Weston, just off of I-75. Keepin' the graticule alive.
2010-03-06_26_-80: In a backyard in Tamarac, a mere 0.5 km (and a 0.8 km walk) from my home!
2010-07-11_26_-80: Between two houses in Sunrise, right between my home and my parents' house.
2010-10-19_26_-80: In the parking lot of a condo in Lauderhill.
2011-03-03_26_-80: On a suburban street near the Turnpike and I-595. The whole neighborhood was being repaved.
2011-09-16_26_-80: At the edge of a pond in a housing complex in Margate.
2012-12-12_26_-80: In the parking lot of the blandest office park in the world. In Coral Springs, near the Sawgrass Expressway.
2013-04-26_26_-80: At the entrance to the Isle of Capri Casino & Racetrack in Pompano Beach.
2015-01-24_26_-80: Near Sunrise Lakes Phase 1 in Sunrise, just off of University Drive. Also near Skyline Chili.
2009-05-30_25_-80: In the street next to a Starbucks at Lincoln Road Mall. The scenery was nice; the weather was lousy. This was my first hash outside of my home graticule. It was also about 41 miles from my home by road according to Google Maps.
2014-04-12_25_-80: Near NW 87th Avenue and NW 154th Street, next to a house in Palm Springs North.
New York, New York Graticule
2013-05-18_40_-73: At the entrance to the DeMatteis Center for Cardiac Research and Education in Brookville, while visiting relatives in Roslyn.
2009-03-14_26_-80: In an (inaccessible) home in Boynton Beach. This hash was notable because I finally met a fellow geohasher (Dtobias), on the sidewalk outside. Also, this was the farthest I've ever schlepped for a geohash - 35 miles by road and highway, according to Google Maps.
2010-02-21_26_-80: Inside a computer shop (closed on Sundays) on Powerline Road.
2011-11-06_26_-80: A few feet into a canal in Coral Springs. I didn't feel like a swim, although I might have tried to Puppet-Master a duck into doing it for me.
2012-07-30_26_-80: About 25 meters into a canal in Tamarac, conveniently on my way home.