We used to do this at the Protestant church I was a part of. We'd do it once a year, sort of a non-sacramental custom or tradition. It was quite interesting. The church was a pretty tight-knit group of about 90-100 though, so we weren't really strangers. I've heard of Orthodox doing the custom as well, e.g. monastics. It'd be a cool custom to use, if people were willing.