I'm a Boston Chowhound that will be in Denver next week for a conference at the Convention Center. We will be on our own for meals, and I was wondering if anyone could make recommendations within walking distance from the Convention center. Any cuisine is appreciated, but I would like at least one good mexican meal while in town (miss it in Boston). I am interested in cheappeciaish eats for lunch, as well as at least one nice dinner. Unfortunately I don't have a car, but something worthwhile on easy public transportion would also be considered. Any suggestions are appreciated.