Mr. and Mrs. Kenneth P. "Ken" Kozlowski of Cheektowaga celebrated their 50th anniversary with a renewal of marriage vows in St. Clare Catholic Church, Buffalo, followed by a dinner reception for family in Romanello's South, Hamburg. They will fly to Hawaii and cruise the islands aboard the Pride of America Norwegian Cruise Line. Mr. Kozlowski and Patricia "Pat" Korczynski were married Oct. 20, 1961, in the Catholic chapel at the Marine Corps base in Key West, Fla. He is a retired U.S. Postal Service carrier, Buffalo; she is a retired registered nurse for Millard Fillmore Hospital. They have three children and six grandchildren.