An American Red Cross blood drive will be held Aug. 22, 2 to 8 p.m., at the Shrewsbury Senior Center, 98 Maple Ave. Open to the public, with residents from all surroundings towns invited to participate. Appointments are preferred, but walk-in donors are also welcome.? All donors will receive a coupon for a free case of water from Walgreens and a Walgreens discount coupon. The Red Cross requires a positive ID before donating.? You must be at least 17 years old (16 years with a signed parental consent form).? You can donate blood every 56 days. Call 800-733-2767 or visit www.redcrossblood.org for an appointment or more information.