Senior Citizens of Davis (SCD) is the principal, non-profit support organization supporting the Davis Senior Center. They provide funding for the Davis Senior Center to publish its monthly newsletter, The Senior Scene.
A copy of the 2008 Bylaws (current as of this posting in September 2012), is available here in PDF form. SCDbylaws2008-2012+.pdf
Currently, membership in SCD includes a mailed subscription to The Senior Scene. Or you can get a PDF of the latest issue from the City of Davis' website about the Davis Senior Center.