Have yet to see any other Monsters here in Gwinnett County. Wednesday night there is a bike night at Blues and BBQ on Sugarloaf Pkwy near Five Forks Rd around 7pm. Ussually alot of bikes...have only seen two other Ducati's there...a 749s and 999.
I have no clue about Gwinnett. My best advise, join the Atlanta Ducati meetup:
http://ducati.meetup.com
That's where I met most of the people I rode with while up there. I'm sure you'll find someone to hang out with there. Most people here like the twisties in downtown, you know who you are ;D