Okay, found this on the link Doon posted
Definition and Historie of Bavarian Beer Table:
A beer table set is a wooden indoor / outdoor dining set which contains one long table and two long benches with foldable legs.
This beer garden furniture had been developed in Germany in the 1800s when the beer garden tradition appears to have emerged in Bavaria. Beer garden usually includes trees and may have shrubs and other plants, along with seating such as benches and tables, called beer table or beer garden furniture. As temperatures begin to rise at springtime hundreds of beer table sets have been folded up at the beer gardens within a couple of hours to provide seatings for their guests. During the cold and wet season the beer table sets have been easily folded and stored.
Beer Table = foldable beer garden furniture, picnic table, outdoor / indoor dining set, foldable party furniture ..