Tag for E-Z Pass service center?

E-Z Pass NH is an electronic toll collection system, and they have walk-in service centers, one of which I mapped when I recently had to use it. How should I tag it?


What does the service center actually do? Can you buy things there? Or is iust an office?
Maybe something with http://wiki.openstreetmap.org/wiki/Key:office


Basically it is an office, so I suppose office:government plus name should do it.