Ashes in bowls of primitive Japanese days

In the days where there was no electricity in Japan, people would gather around ceramic bowls. In the middle of the bowls there was charcoal and around the charcoal were ashes. This same instrument, but in a smaller scale, is used at Café Reino.  The size of the bowls is not the only difference. Replacing the ashes are coffee grounds. Coffee grounds are known for many usages, one being their deodorant qualities. And now, in the middle of the bowl are the ashes of whatever the guest might be smoking.

Ashtray / Cafe Reino, Roppongi, Tokyo, Japan / Leica D-Lux 4
Ashtray / Cafe Reino, Roppongi, Tokyo, Japan / Leica D-Lux 4
Ashtrays at Cafe Reino, Rappongi, Tokyo, Japan / Leica D-Lux 4
Ashtrays at Cafe Reino, Rappongi, Tokyo, Japan / Leica D-Lux 4