Pistons on the Square - December is a monthly car and motorcycle gathering on the historic downtown square in Georgetown, Texas. Antique, classic, muscle and late model rides roll in and park around the Downtown Georgetown Square, so you can wander, admire the chrome and chat with owners. It's a laid-back way to start a Saturday, with plenty of engines to check out. It's free, and the morning crowd makes it perfect for car lovers, families and anyone who enjoys a good old-fashioned car show.