DES MOINES, Iowa — For $50, B-Bop's fans can put themselves to the ultimate test. Only at the Grimes location, that price buys you into the fast food chain's Belly Buster challenge.

B-Bop's employs about 140 full- and part-time workers, including 24 managers. "Our managers have been with us a long time. Twenty-two years is the longest," Johnson said.