California Code, Revenue and Taxation Code - RTC § 215.2

Property owned by an organization that satisfies the requirements of Section 214, 215, or 215.1 and which is used primarily for exempt purposes shall not be denied the welfare or veterans organization exemption because such property is also used for conducting bingo games pursuant to Section 326.5 of the Penal Code, provided that the proceeds from such games are used exclusively for the charitable purposes of such organization.