CultureFinder Search for Theater, Broadway, Music, Opera, Dance, and Visual Arts events and tickets. Leukemia Society of America See if they have charity events in your area. The National Multiple Sclerosis Society find the chapter in your area and volunteer. They also are having MS bike tours. SkiClub Central Great site.
Some ski clubs have events year round.
USA Volleyball for the serious volleyball player. Snow Skiing Links Lists various Mid west Ski Clubs. It only takes one new person in your life to gain expose to new social resources. Get involved with sailing in your area. Running Clubs Running Clubs by city Sport and Social Club Sports leagues for singles in major cities.