Most of these places are within walking distance:
My favs are JAX(love the dirty martinis), Rocky Mtn Diner(great food), McCormick’s(phenomenal happy hour prices), Osteria Marco(great small plates), Sam’s is a great diner.
Also, if you can get to 7th and Santa Fe, try El Taco de Mexico. Small place, cash only. Awesome food. Try experimenting. I love the chile relleno burrito.