To Insure Proper Service

I'm not entirely sure why some people don't tip. It seems to me like if you can afford to spend money going out to eat, it's silly not to put in a extra few bucks. Like the 20 dollar surf and turf was in your budget but not 5 for the person who just personally looked after you and your friends/family? It's even wierder now that I'm bartending weddings. It's an open bar. These people pay nothing. They are putting drink after drink away. For some people they easily drink 100 dollars worth of booze. And not a buck. So you say, but that's what your paid to do. Fair enough. And it's not a bad arguement, but I just say why not? If you unload 5 bucks a night after I make you 10 drinks, is that going to be detrimental to your bank account? And wouldn't you just feel better and then I'd feel better and so on and so forth. I guess it really does get to me sometimes because it's such a small gesture yet many people refuse to do it. Don't get me wrong, there are plenty of great tippers out there and they are much appreciated.