I've really enjoyed being on the ground floor of a vegan co-operative (aka buying club) in my home town. It's not food service per se, but it is food-related and definitely in alignment with my values (and maybe with yours). Plus, it develops a local vegan community.
It is only in its beginning stages now and is essentially a buying club. We have an account with a major natural foods distributor (UNFI) and can order anything from their catalog.
The software we use allows us to split bulk bags of beans and other 25-lb size items. We have fridges and freezers (donated or bought on Craigslist) in a small, cheap rental space so we can order ice cream and frozen foods. Our markup is 20% over wholesale, to cover rent, insurance and utilities. Right now we are completely volunteer run, so no salaries. Deliveries are every two weeks and generally we ask that people pick up everything they ordered soon after delivery so we can save money by turning off the fridges.
Eventually we will tie in with a local farmer to offer produce, but not yet. Since we are approved by the health department, we can sell packaged goods from any certified vendor (for instance, a local vegan cupcake baker).
Also, eventually we want to accumulate capital to have a collective kitchen / vegan biz incubator / education center and have longer hours.
The main thing I've come to realize is that our member-owners have a far, far greater variety of vegan options than any store will ever carry. It saves me time and money because now I don't have to make that special trip to each separate store that happens to carry the one vegan item I wanted. And it's lovely participating in a venture that is by, for, and with other vegans. Our local "big" co-op started out as a vegetarian buying club many years ago. Then in 2008 the BOD reorganized and revised its charter and the membership voted that the store carry meat. That change still rankles me.
Our core group of organizers and worker-bees is about six people. One amazing person got the ball rolling *by herself* over an incredibly intense one-week period. She had a lot of small-biz experience.
Here's our website, if you're interested - http://www.chicovegancoop.org/