About Triangle. The Triangle Stores, located in Orange County, California have been in business since April 1978. In the world of billiards, games and gaming sales, thatâs considered a very long time. Triangle is one of the oldest established billiard and game stores in the United States. Triangle offers a wide variety of Pool Tables, Bar Stools, Air Hockey, Shuffleboard, Foosball, Custom Cues, Darts, Game Tables, Juke Boxes and many other fun products.