Welcome to Permies, Gary!
It can't hurt to try. However, unless the community leaders are already permies themselves, I wouldn't expect much from them. They tend to be the status quo types who think more about how to game the current system than they do about new ways and
sustainability. They are much too important to think about planting the neglected spaces of the
city with useful plants. When I drive around town, I see many, many places that could benefit from a
permaculture project, but few places (although more than zero) that are being shaped by
permaculture thinking.
When you do see permaculture being applied, it is usually on a private piece of land, although there is the occasional "guerrilla gardening" effort. But you say you do have a community center that could be a good location -- what's happening with it now? Are there vegetable beds? Do they know about
hugelkultur? Could they put one in?
Do you have a food bank? The one here in Augusta has a small vegetable garden; I think it produces more plans, ideas, and dreams than it does actual vegetables though.
Here's a thought for you to start with: locate all the fig
trees in town and this winter take some cuttings. Maybe make it a project to beautify the area by cleaning up an overgrown tree. Then take all your cuttings and
root them in plastic pots. Comes next March when they start to leaf out, you can have a planting program and then next July, everyone can be enjoying the tasty figs. It won't cost anything except your time to do it.