It's always 20% for me unless they've given me reason not to. I give them the benefit of the doubt if they just seem tired or stressed (especially in the middle of a busy restaurant), but if they're downright rude no 20%. That very rarely happens to me, though.
__________________
IIII IIII IIII
"A child of five would understand this. Send someone to fetch a child of five."
Groucho Marx
Threaded Mode
