Drinking at a bar is like traveling to a foreign land where the dollar is strong compared to the local currency. Sums you don't normally see associated with 12 ounces of liquid are added to your tab and effortlessly charged to your credit card where you can only hope that the foreign exchange rate will pull the numbers into a reasonable range. Don't worry, it's more like Australian or Canadian dollars. You're on vacation so to speak. It's okay. Should I really tip one "dollar" to that scruffy gentleman because he opened my beer for me? Of course! It's local custom. You don't want to look like a tourist, do you?