i always tip at least 15% unlerss the serivice was that bad, and i will tip more if service is good.However i dont believe in 18% autimatically added to your bill or anything automatically added to your bill for that matter, also i think that its a safety net for the workers saying "you dont...
^ that would be getting listed on ebay immediatlly!!......i sure as hell wouldnt be retrieving it but if i can find and idiot that would let me hold them by their ankles and dunk them head first in the bowl sure why not.