On 100$, its a little low than what's average in America, but still it's your choice. If you do tip 7$, id not become a regular at that place, ive seen servers "deal with" low/no tippers and it's disgusting. Its not right, but it definitely happens, you don't wanna be eating there again 🤢. I like the tipping system in America, I just dont like greed, 30% demands for average is ridiculous. 20% for excellence, 10-15% for average. Tho for bigger bills, if i ordered alot and ran them, ill tip 15-20