Santa Cruz Bike Party Group Ride: Bike Party Group Ride (7-9pm): Jump on your bikes for a green-themed Bike Party Ride organized by Santa Cruz Bike Party. Santa Cruz Bike Party is a mobile party for riders of all ages, experience levels, and types to meet, ride, and play together in the streets. The theme: Bikeodiversity is good for a healthy bikecosystem. Bikes come in all shapes, sizes, colors and configurations. For this bike party, we’ll celebrate the diversity of bikes, riders, and styles on this fun Friday night celebration.