Peterson, Williams & Bizer, Ann Arbor, has been named agency of record for Bariatric Treatment Centers.Kruskopf Olson, Minneapolis, added two new franchisor clients; the seven-store Pet Food Warehouse chain and the 21-store CD Exchange.Pagoda International, an international footwear manufacturer that is a part of the Brown Group, selected The Puckett Group, St. Louis, its agency of record.Northlich Stolley LaWarre, Cincinnati, has been named agency of record for ChoiceCare, a regional health maintenance organization. Its responsibilities will include advertising, promotion, collateral development and pr.ILLINOISFrankel & Co., Chicago, has been named national consumer promotions and sales development agency of record by Discovery Networks, parent of The Discovery Channel and The Learning Channel. The agency will handle strategic planning for integrated consumer and trade promotions, and concept development for national promotions.Investor Relations Co., Northbrook, has been retained by Renaissance Entertainment Corp. to handle financial pr for the company, which operates the annual Bristol Renaissance Faire in Bristol, Wis.Aaron D. Cushman & Associates, Chicago, has been retained by the Mackinaw Area Tourist Bureau to handle marketing, pr and promotions for the first Soap Opera Fan Fair, to be held June 1-5, 1994, in Mackinaw City, Mich.Zylke & Associates, Northbrook, has been selected advertising and pr agency of record for Nissan Forklift Corp. of North America.Chicago Brewing Co. has selected JSL Advertising, Evanston, as its agency.Copyright Adweek L.P. (1993)