To get the word out about the first guitar center Mitchell did the following creating the world's largest Les Paul guitar cake. Kept the store open 24/7 for 11 days—a Guinness Book world record for the time. The company was expanding fast in the 1980s. The store on sunset boulevard in Los Angeles, California was the first in which the staff, mostly musicians, encouraged and praised customers to play the instruments. Guitar Center acquired the online site Musician's friend and expanded and continues to expand through the U.S.