If the nature of restaurant service is to take care of people, no one is doing a better job than Nathan Buss, a server at Session Kitchen. Buss took the concept of service to the next level by creating his Tips for Tuesdays program, in which he donates all the tips he makes during his Tuesday-night shifts to charity. He estimates that he's given away over $8,000 so far to local nonprofits such as Urban Peak, Veterans to Farmers, Project Helping and Mile High Squash, to name just a few. What began as a way to help people has attracted guests — sometimes forty or fifty every Tuesday — who dine at his tables for the opportunity to donate to his chosen weekly nonprofit.