BobL those are popular in Japan also. My daughter has put up photos during some of her past visits of restaurants with that setup. She didn't go to Japan this year (last year's trip was cancelled) because Japan has been slow to vaccinate the population. She and two friends (all vaccinated, all wearing masks) went to Italy where they've done a better job vaccinating (and last year in the spring it sounded like the entire nation had COVID so perhaps there is natural immunity at work now.)