The Fort Collins Dojo is located within Colorado State University's historic
South College Gym on S. College Avenue in Fort Collins, Colorado.
Classes are held on the second floor,
overlooking the basketball and volleyball courts.

Directions:

From College Avenue (287) turn west into W. Laurel Street
   (north border of the Campus).
At the railroad tracks turn left (south) into Mason Street,
    and after crossing 'Old Main Drive' go along the railroad tracks
    down the slope.
Turn left into a parking lot that is divided by a railing.
Enter the building on the ramp.

Inside,  the double door to the left opens into the basketball court.
The Ki-Aikido group meets in the matroom, which is on the upper floor ("balcony") on the opposite end of the hall.

Here's a map.