Cascade Regional Blood Services are in the area today, Dec 11. They have a mobile unit that people can visit to donate at Franklin Pierce High School this morning and Graham Safeway this afternoon. 
3 bloodmobiles at Bethel High Nov. 30
Help them save lives. Cascade Regional Blood Services, your community blood center, has been providing blood products and related services to patients at South King and Pierce County hospitals and clinics for over 65 years. These facilities are part of Franciscan Health System and MultiCare Health System.
12/11/2012, Graham, Safeway—Graham, 10105 224th St E, 3:30 PM-7:30 PM
12/11/2012, Tacoma, Franklin Pierce High School, 11002 18th Avenue E, 8:15 AM-2:15 PM
12/27/2012, Tacoma, Safeway—Spanaway, 15805 Pacific Ave S, 1:00 PM-7:00 PM
Here is the website list of mobile donation opportunities:
Pierce Prairie Post 