Unless you are with friends or a frequent diner at a restaurant or bar, the correct moral move is to stiff the waiter on the tip. If you're traveling somewhere alone, you should universally fail to tip as you're not likely to ever return there. If this fills you with immediate moral revulsion, you're not alone.

I never tipped any waiter in my life. Tipping waiters seems to be an American idea. They are employees and they should be getting normal salaries.