In the study, 460 ethnically diverse elders were recruited from 21 sites in the greater Los Angeles area, and participated in a randomized experiment containing a semi-crossover design component. The sites included 9 senior citizen centers (Culver City Senior Center, Estelle Van Meter Multipurpose Center, Hawthorne Senior Center, Hollywood Senior Multipurpose Center, Joslyn Adult Center - Burbank, Lennox Senior Center, Long Beach Senior Center, St. Barnabas Senior Center, and Slauson Recreation Center), as well as 12 senior residences (Casa TELACU, Covenant Manor, Eucalyptus Park, George McDonald Court, Motion Picture and Television Fund, Pilgrim Towers East, Regent Plaza, TELACU Del Rio, TELACU Manor, TELACU Senior Housing, TELACU Terrace, and Ward Villas).