Temporary, unlit signs no greater than 32 square feet in size advertising a community event or activity. For the purpose of this section, a community event or activity shall be defined as an event or activity sponsored by and/or for the direct benefit of a nonprofit organization as defined by Section 501(c)(3) of the United States Internal Revenue Code, as amended, and formed for the use, benefit and enjoyment of its members to achieve religious, recreational, charitable, municipal or educational pursuits.