As mentioned here prior, there is often an issue with the bill. After you have been presented with the tab, there is that wait until someone comes to collect your credit card or cash.

I realized tonight that many restaurants place a bottle of water on your table. That way you can refill it at your leisure, decide how empty it has to be before you get another refill, etc.

Shouldn't there be an easier way for the bill? I know in some Korean restaurants there is a button you can press to get the waiter's attention.