Event and meaning of a lot of these old photos have been forgotten, including this one. But there are some conclusion I can draw from the content or persons pictured. The inn named “Enztallust” is located in Enzklösterle, about 2 hours (at that time) from where my father lived. The man with the tie in the door I have seen on other pictures before, it is a colleague of my father, so my guess (!) is that this was some work outing.
The inn itself burned down in 1972 and was rebuilt as Enztalhotel and still exists today. The car on the right side is of course a Volkswagen Beetle, the 1949 version with the split back window. On the very right side you can see the tail end of a bus.