If that's how you feel, go to the store, but a beer and serve it to yourself. Bye.

Yes. You tip no matter what. Duh.

You tip 18-20%. Not 15%.

“I’m already paying for the food, I shouldn’t have to pay the server’s wage too.”

You ALWAYS tip on the grand total.

Just stay home and cook for yourself if you've had a bad day. Don't make someone else suffer for it.

You are not tipping the man that makes your lunch. You are tipping the man that delivers your lunch and drink, refills your drink if needed, and cleans up after you're finished all for less than $3 an hour.

You suck as a person. It's 18-20%. Get with the times.