Tipping plays an important role in the USA. It is common to tip in restaurants, bars, hotels and casinos. In most cases, the usual tip is about 15-20% of the bill amount. In some cases, such as exceptional service or in upscale restaurants, the tip may be higher. Tipping is a way to reward service and provide extra income to employees. When you tip in Las Vegas, there are a few you should be aware of some peculiarities. In some restaurants and bars, a service charge is automatically added to the bill. In this case, it is not essential to tip extra, unless you want to specially honor the service.