One of the café I like to visit (it is the only non-smoking café that I know of) has this wide stripe of murky glass along the length of the glass front. This is probably to give the people sitting in the café the illusion of privacy, while offering the maximum of light. For those of us who are people watchers, we only get a glance of pedestrians walking by from the waist down. It’s actually very entertaining, and smoothing, in a surrealistic way.