Hi Owl: Kunzle's definitely had real sit in and dine restaurants. From the link that I quoted above about the transportation of their goods
this passage tells about the restaurants run by Kunzle's. They had their own piggery in Bartley Green also for meat.  
"In addition to the perishable produce distributed in the Midland  area, the five cafes in Birmingham and the four outside cafes are  supplied from headquarters with all other types of consumable produce,  including meat, poultry and vegetables. Delivery is divided between 20  runs, each with a weekly average of about 450 miles and destinations as  far afield as Leicester, Stratfordon-Avon, Hereford, Nottingham,  Worcester, Coventry, Shrewsbury, Malvern and Leamington. Deliveries vary  between two and four a week, according to the type of distribution and  the number of calls made.
 			The first cafe to be opened outside Birmingham was at Leicester,  which has played a very important part in the history of Kunzle's road  transport development, as it was the destination of No 1 run. That was  in 1919, when operating costs made it imperative to find customers on  the route taken, to justify the use of road vehicles. The rapid  expansion of business which followed left no doubt that deliveries by  road offered almost limitless facilities for extending distribution  without undue complication. To-day, No. 1 run is still prefixed "The  Leicester," despite the inclusion of Marston Green, Nuneaton.  Atherstone, Hinckley,"