Yoga for 55+ (Yoga for Seniors) with Herta Weinstein, M.D. Wednesday Mornings, 11:30-1:00pm Series, $13 per class/ Drop-in, $15   Yoga for 55+ is a gentle yoga program for seniors (or anyone with physical challenges) to enhance strength and flexibility. Poses will be modified to suit your individual needs. Anyone of any age who can climb the flight of stairs to the studio is physically able to join this class!   Herta Weinstein, M.D., a graduate of The Yoga Room's Advanced Studies Program, has been practicing yoga since 1978, and teaching seniors and people with disabilities since 1995 in both classes and individual sessions.   The series fee will be prorated for students joining for a partial series. Reduced fees are available upon request for residents of senior housing, and members of senior centers and over-60 clinics. For more information, call Herta at 510-845-8724.