IMO every service center should have some kind of supercharger, even if it is limited power, for testing.
Some service centers have what I like to call mini-Superchargers. That is, a single Supercharger that can accommodate two charging connections. These are useful to support service center operations, but they absolutely do not support the intent of the Supercharger network. A typical real Supercharger station has 4 Superchargers that can accommodate 8 charging stalls and it is strategically located off of a major highway. It goes without saying that typical Supercharger Stations are located at host locations with lots of amenities. At most service centers all you can count on is a rest room and maybe a complimentary soft drink.
Although I seriously question the logic I can appreciate locating a service center
near a legitimate Supercharger Station. I can not envision locating a Supercharger Station
AT a service center. Again, what I mean by a Supercharger Station is a collection of Superchargers that support many Model S owners taking road trips.
Larry