In many Korean restaurants, there is a button on each table with which to call service. When you press it, a bell rings and someone comes promptly to your table. It's a great detail once you get used to it. When we first got here, being the polite and passive Canadians that we are, we were at first reluctant to so obtrusively call a waiter instead of just waiting for someone to happen by. As it is, nobody minds and because they are expecting you to ring them, if you do not then you might wait for a long time before getting any service.