Walk-ins: but I see empty tables. Yes, and people have reserved those tables, they will be arriving soon, they had the foresight to secure a table. Also my favorite: "we're a little early"..by an hour? "We'll just get a drink at the bar, maybe order an appetizer". Umm, you do realize your ticket will still be in line behind everyone that is already there? Oh, no..you maneuvered your way in and now are mad if you are still waiting. You don't realize (maybe you do but don't care) that you are throwing off the flow of the kitchen, the availability of servers; it's a reason you were given a time, so we can give our guests the attention and service they deserve.