[naraht]

According to Baird's Manual of American College Fraternities back in 1991, there were four groups in the section for Alpha Phi Omega. This was the service subgroup of the recognition societies chapter. The four were Alpha Phi Omega, Gamma Sigma Sigma, Intercollegiate Knights and SPURS. Intercollegiate Knights (which was historically men) is down to about 2 or 3 chapters at schools in the Northwest from a high of about 40 and SPURS (historically female) actually formally dissolved itself at its last convention.

I don't know why Omega Phi Alpha wasn't in the last Baird's, but they certainly count as National. The only other group that I know of that might count is Jewels of Tau, but I don't know if they refer to themselves as a Service Fraternity.

In terms of locals, you have a number of them including Kappa Alpha Kappa which is at Maine-Machias, CHI's at Baylor, Chi Gamma Phi at UC San Diego, and probably others.