The Mark Twain membership level is a family membership. Family membership includes all immediate family members living at the same street address. Membership in HFFC gives you access to all of our events. This level of membership entitles you to a special gift of an HFFC T-shirt. With membership, you help all of us maintain a secular community in Fairfield County. Memberships are for the calendar year. Members joining after October 1 will have membership extended through December 31 of the following year.