Home › Venues › The 1up – Colfax The 1up – Colfax Tickets Buy tickets for concerts at The 1up – Colfax in Denver, CO. No Upcoming Events No upcoming events scheduled at The 1up – Colfax. Please contact us with any corrections. Hotels & Lodging Near The 1up – Colfax About the Venue The 1up – Colfax At-a-Glance Capacity 500Address717 East Colfax AvenueDenver, CO 80203United States Map & Directions Advertisement