If you have about 3 hours midday and are a foodie, i would recommend Rhode Island Red Food Tours. They share some great bits of history and the food you sample is really delicious and varied. It covers several blocks downtown, both sides of the river. Lots of great murals and architecture.

I had a group of about 6 friends come to town in October and we all did the tour together.

Armory is definitely the way to go. The vets & techs are awesome and it is definitely mom & pop. Had a long talk with one of the vets there about how larger orgs are buying up all the once independent practices.

I was coming to say Nami as well!