Moo Sul Kwan Martial Arts Institute
13401 W Alameda Pky
Denver, Colo. 80228-3780
I'm not sure who the instructor of that particular branch is, but the master instructor for the Western Moo Sul Kwans is Jim Sautel, 6th dan.
They practice both the Chang-Hon and Taegeuk forms.
If your friend happens to meet Master Sautel, please send greetings from Scott Welton, Master Mike Morton's student, formerly Master Steven Dunn's student.
My instructor and I both teach Ch'ang H'on TKD - he's at Front Range Community College, in Westminster (112th, between Federal and Sheridan) and I'm at Schlessman YMCA, in Denver (Colorado and Yale).
Scott beat me to it. Master Sautel is great, I saw him in March at our national convention. If it is good TKD you are seeking then give Moo Sul Kwan a try.