10 of the world's strangest social networks

If you crave advice on sculpting the perfect mustache, revel in the dark and mysterious world of vampires or seek a divorce from your partner, yes, there's a social network for that. Here are 10 weird and truly niche social networking sites that strive to bring together some unusual birds of a feather.

StachePassions.com
Tom Selleck, no doubt, would be a fan. StachePassions.com is a social networking site for those fond of flavor savers. You can browse Mustache Groups to find members by their preferred 'stache style, including the Dali, Walrus and Pencil, or by their experience level: newbie, expert or Stache Groupie. Also featured on the site: "Stache chat," message boards and email. Gilette is definitely not a sponsor.

VampireFreaks.com
Think "MySpace for hemo-gobblers." This site boasts a surprising 2.2 million members and targets those with a fascination (or is it obsession?) for all things gothic. Users create profiles and can peruse info on top Metal bands (Slipknot, Cradle of Filth, Dealthloff), "rate" other users, join "cults" (i.e. interest groups such as "Emo Hair," "Twilight" and "Marilyn Manson") and participate in chat rooms.

ZiiTrend.com
Calling all clairvoyants! Zii Trend is a social prediction community in which users predict future events and trends. The site is based on the theory that aggregation of information in groups results in decisions that are often better than those that could have been made by any single member of the group. Here, users weigh in on such questions as "When will Madonna announce retirement?" and "Will there be a World War III before 2050?" Maybe these folks can figure out what will happen on "Lost" at the end of the season.

Eons.com
As the name suggests, Eons is a social networking site for, well, folks "in their prime," or more specifically, Boomers. Much like Facebook, users build a profile, join groups, share photos and videos and play games "to keep your mind sharp." One feature on Eons that you probably won't find on Facebook: a "longevity calculator" that determines your life expectancy and offers personalised advice for "living longer and healthier."

LineForHeaven.com
If you're looking to get in good with The Big Guy Upstairs, consider Line for Heaven. Here, you earn karma points by "blessing" people, which helps to save your soul and reserve a place in heaven (spots are awarded on Judgement Day, every Sunday). Amen to that.