The prestigious South Loop Office Center at 850 South Wabash is the premier address in the South Loop for office and medical tenants. Originally built as a YMCA and later changed over to a movie theater, the building was converted into office use and features a renovated lobby and common corridors and updated elevators and mechanical systems. , and dramatic ceiling heights. About the South Loop Situated steps from Grant Park and nearby numerous residential towers, educational institutions and student housing developments, the South Loop offers a truly electric location. Adding to the convenience is the close proximity to to Lake Shore Drive and the Red, Orange and Green line trains at Roosevelt.