Glenn A. Duhl Authors Article for Modern Restaurant Management on Behalf of the IADC June 12, 2019 12:42 PM Glenn A. Duhl Glenn A. Duhl, a shareholder at Zangari Cohn Cuthbertson Duhl & Grello P.C., recently wrote an article for Modern Restaurant Management on gratuities in the restaurant industry today. To read the article, click here. Back to news