Thanks for the info, Cassius!
I was able to dig up the section of the forum on this website ('Regional Epicurean groups and activities") where you can start a thread on potentially creating local gardens.
I think we would need critical mass to start a meetup. To begin with, a small group, even 2 or 3 people, would be a great start and expand from there.
I think I'll just start a thread here and see what happens.