Punch Card Sale Aug 3, 2021 Waterloo Grand River Rocks turns 10 this month! WOO! 🎉 To celebrate we’re doing a 10-punch card sale! Punch cards don’t expire and are valid at BOTH GRR LOCATIONS! Have a membership at Waterloo? You can get a punch card on the side for the occasional visit to the Kitchener location! Sale ends Wednesday, Aug 11. Purchase online or in person.More birthday celebrations to be announced soon!