ARGYLE - With a family of role models, Monroe native Roberta Bayrhoffer has been immersed in the daily operations of businesses for decades, and even in the face of retirement could not resist the challenge of bringing a small-town grocery store back to life. After graduating from the University of Wisconsin-Madison in 1986, Bayrhoffer, now 52, left the state for California, where she resided until last year. She moved back to Wisconsin from Long Beach with plans to retire after operating a retail store called Bungalow Bay since 2001.