As Fred & I found out yesterday, it is always best to check opening hours in Denver. It surprised us to find that Sullivan's is not open during the day on weekends.
Hours of Operation:
Lunch: Monday - Friday: 11:30am - 5:00pm
Dinner: Monday - Thursday: 5:30pm - 11:00pm
Friday - Saturday: 5:00pm - 11:00pm, Sunday: 5:00pm - 10:00pm
Sullivan's is a great place to visit on thursday nights as their happy hour is all night. This includes some great drink specials & 1/2 price appetizers. I don't know anywhere else in town where you can get a New York Strip for $5.