Life Time Athletic-Flatiron Share: Health Club/Fitness Visit Website 300 Summit Blvd Broomfield, CO 80021 (720) 531-8000 (303) 729-2550 (fax) Facebook Hours: M-F 5am-10pmSa/Su 7am-7pm About Map About At Lakeshore Athletic Club, we are proud to serve our members with an unsurpassed, personalized level of service, a superb location, excellent programs and services in our 150,000 sq. ft. club. You belong here! What's Nearby? Distance: 5 10 15 20 25 50 mi.