I've noticed that the people who are most commonly seated beside windows, or in the front row on the patios are the people who are the "ideal customers" for the chain. At some places they want lawyers in suits, other times they want teenagers having fun, and other times they want families.
I'm not saying this is always the case of course, and I'm sure that seating isn't necissarily based upon looks or who you present yourself as, but marketing is marketing. Don't take it personally, it's just how things work I guess.
Oh, and the tipping thing reminds me of Resevoir Dogs. Good old Quintin!
