HAPPENIN’ OTSEGO for MONDAY, MARCH 28 Seniors Walking Group WALKING CLUB – 10:30 – 11:30 a.m. Enjoy a fun walk on Mondays & Fridays with friends old and new and listen to music of the 70s. Free for members, non-members aged 50+. Clark Sports Center, Cooperstown. 547-2800, ext. 109 or visit www.clarksportscenter.com BLOOD DRIVE – 1 – 6 p.m. Clark Sports Center, Cooperstown. 1-800-733-2767 or visit www.redcrossblood.org…