Grand Rapids, Michigan
From Geohashing
The Grand Rapids graticule is at latitude 42, longitude -85. It includes much of the Greater Grand Rapids area along with the cities of Kalamazoo and Battle Creek. Since the area is mostly farm land, the majority of meetup coordinates will likely be on private property, and meeting at the nearest public road intersection may be advisable.
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Local Geohashers
Dawz: I'm actually from the Muskegon graticule, but more often than not it's far too wet for my tastes. My Saturdays are currently open.