There is a (relatively) new bisexual group based in Norwalk, CT (Fairfield County, zip: 06850) -- Bisexuals and Allies of Fairfield County. We formed in July 2013.
We meet at the Triangle Community Center (http://www.ctgay.org/), at 618 West Avenue, Norwalk, CT 06850, every other Thursday evening at 7:30 p.m. (odd weeks, so if you're looking at a 52-week calendar, we meet on Weeks 1, 3, 5, etc.). The meetings at TCC are peer support-oriented, but we also do social gatherings like hikes and dinners, which are organized via our Meetup group.
The Meetup group, which is private (to protect members who are not out of the closet, and to discourage spamming and trolling), is here: http://www.meetup.com/
Contact for the group: Sam H. (email@example.com)