asmodeus

I'd say John Jay would be the safest route. I'm pretty sure they still don't require a GRE, and your involvement in non-profit work and AmeriCorps should help sway them in your favor. However, their strongest concentrations aren't terribly applicable to non-profit work. If you want to explore John Jay, and depending on your intended specialization in the MPA, I'd reach out to either Professor Rubin or Professor Benton directly via email. Explain your concerns and express an strong interest in the program and furthering your work. I was admitted after the deadline from doing just that (though it was a few years ago and I had a high undergrad GPA). Baruch is tougher, and NYU Wagner is the toughest in your list. Good luck!