I use to be a massage therapist...so I tip based on performance. I am not picky when it comes to my Hair. It is only Hair and will grow back. For some reason People do not like to cut my hair saying "it is so thick and long, why would you want to cut it?" They tended to be the nervous ones and only cut 1/4th inch when wanted 2 to 5 inches removed. Had plenty of experiences of bad hair cuts and styles gone wrong.
my younger brother would take a stack of $1s and at beginning of our meal he would lay the stack on the table. Each time his cup got empty and left longer than a reasonable amount of time or kept asking if we needed anything every 5 mins. he would remove a dollar.
Only one time that I know of the waiter/es was left with $1 dollar. Very Poor service.