Typically tip about 20% if I dine in at a rest., get pizza delivered, eat at Sonic, etc. If I pick up a to go order I'll usually do 10 - 15%. Like someone else said, the hostess had to take the order, check it, bag it, ring me up, etc. At a bar I'll usually do a $1 a round or 20% if its a pricey place or I'm only getting one round. Don't be a tightass. I started these habits after listening to years of horror stories from friend in the food industry. Two of the biggest complaints are places that let law enforcment eat free and then they don't tip and also people that bring in a gift card and don't tip on the full check amount.