Triplestep Dance Productions established in Bellevue, Washington 1999. Federal & WA State Trademark Registered. Produces the Alley Cats Swing Revue, an Eastside Youth Swing Dance Club, Swing Dance Lessons, Lindyhop, Shag, Balboa, Jitterbug.Triplestep Dance Productions established in Bellevue, Washington 1999. Federal & WA State Trademark Registered. Produces the Alley Cats Swing Revue, an Eastside Youth Swing Dance Club, Swing Dance Lessons, Lindyhop, Shag, Balboa, Jitterbug.