Originally Posted by
JeffreyAK 
What I notice the most is trying to get decent service at a nice restaurant when you don't order drinks. Automatically, the bill and therefore the waiter or waitress tips get cut in half, so the tendency is for them to pay zero attention to you and hope you go away.
So true, when the waiter comes to get your drink orders and you ask for tap water or diet Coke, you can kind of feel the disappointment. But their loss is your gain. I can now often order the most expensive thing on the menu and the check will still seem remarkably low.
Did you ever notice how when drinking was involved the normal rules of economics went out the window? When I was a student with no money, I would often spend $100 on a night out drinking that I couldn't afford. But rarely spend $10 to eat out due to the expense. It just shows how your rational brain turns off once the wonderful drug is coursing through your veins.