Some ideas for loads:
I would guess a 7.5 HP air compressor. If it is for mechanical repair it could be smaller but a body shop may be bigger. Auto body the air tools will run much more often and use more CFM. Body shops might have and air compressor drier. A body shop will or at least should get a paint booth. The lifts seem to allways be 2 pole 20a. The lift motors work for about 20 seconds raising and not for lowering. Just like everything elce many auto shops have computer terminals in the bays. Besides that figure a bay could use a few quads for things like battery chargers (car & cordless tool), smog testors, radios, drop lights, A/C equipment. Mig welder plugs in several locations is not uncomon. They will also have fixed equipment like brake legths or a pipe bender. Most shops have electric door openers.
Every shop will have small kitchen appliance loads like a beer frig, microwave, coffee maker, water cooler, maybe vending machines. Water heaters tend to be the small electric ones. What about a sign in front or show window lighting? Hope they have a TV in the waiting room. Add a few more for comunication equipment.
