Up to the light
In the Buffet de la Gare there was precious little light, as I recall, to inspect the stubbies of local beer. The safest bet was to drink the contents through lightly clenched teeth. Especially as one of the 47AD boys claimed to have found an ex mouse in one bottle.(Could have been a plant to get free beer).
The delumination of the place covered a lot of sins and often one was first aware of the approaching presence of "nightfighters" at the back of the group when a delicate hand administered a firm grasp of the lunchbox in the dark. Trying to force beer back through clenched teeth led to all sorts of hydraulic consequences. I believe.