Detailed Instructions: Given a real-life anecdote of a complex ethical situation, identify who is wrong here. Classify each post into the following categories : AUTHOR (if the author of the post is wrong in the situation), OTHER (if any of the others mentioned in the paragraph is wrong), EVERYBODY (if everyone mentioned is wrong) and NOBODY (if no one is wrong in the situation).
Q: On mobile so formatting might get messed up.

I understand that at sitdown restaurants it is courtesy to tip, and I make sure to give a good 20% tip every time I go to them, but here are some situations that I ran into last week that make me question whether I should always tip.

1. I got $3.50 bubble tea, and saw the barista make it in 30 seconds right in front of me, and when I swipe my card I get an option to tip. I saw no reason to tip.
2. This happened in another, similarly priced bubble tea place. After filling out $0 as the tip in the receipt the waitress looked at the receipt, frowned, and then proceeded to make the bubble tea. It took 2 minutes to make and I walked up to the counter to pick it up, as all customers do. I dont think such service calls for a tip.
3. I ordered a takeout udon bowl at a normally sitdown restaurant, and it was ready in 3 minutes. Because no one waited me and all that happened was an order was filled out, I dont think I need to fill out a tip.

AITA for not paying tips in these scenarios?
A:
OTHER