The Service Bay
Need emergency repairs while on that road trip? Broken fan belt? Leaking radiator? Replace a tire? Those services where once available at most gas stations along your route. The service bay was where the work would take place and if it required the mechanic to get to the vehicles underside then there was the hydraulic lift in the center of the shop to raise the vehicle.
Today, a stop for fuel requires you to pump your own gas and emergency repairs, well, good luck with that.
The service bay pictured below was once part of a Sinclair station in James Town, Wyoming.