25. Restaurant Dos and Don ts When you want to eat at a Western restaurant， you should first consider making a reservation. If not， you risk having to wait for a long time for a table. When eating， the Japanese and some Chinese are in the habit of slurping their food. By doing so， they show their host how much they like the food. Westerners find eating soup this way most unpleasant. They also consider picking one s teeth and putting on makeup at the table no-nos. and when it comes to tipping， they just leave some money on the table. The amount is up to you， but it s usually 15 to 20 percent of the check.