Where I work, each person usually gets 4 tables. Depending on how busy it is, a lot of times all 4 tables are not even filled. If someone had 7 tables all filled at once the server would not even have enough time to spend earning that 10 percent at each table. If everyone tipped 10 percent, I'm guessing the dollars per hour would be a little below 10 bucks. It wouldn't be horribly low, but I don't think it would be as high as your estimate.