The point of this page, as with all resource pages, is that Google doesn't tell you the difference between the good pages and the useless pages. In addition, when searching for information related to sexual orientation, there's a nontrivial risk of happening on unsavory material. Unless something has changed since I last researched these links, you'll find nothing of the sort at any of them.
There are lots of local/regional social and support groups. It's currently not clear what the simplest way to find them is.
Regional, national, and international bisexuality conferences (which usually have a mix of support, activist, social, and academic content) are generally announced on some of the above pages.