A privately owned Z-Bop.
Z-Bop was the robot mascot of Discovery Zone. He would interact with guests, and was controlled by an R/C. He also had a few buttons on him that would make random sound effects. He also played music using a cassette player system and an onboard stereo with two speakers.
The Z-Bops were built by a company called 21st Century Robotics.
After Discovery Zone's bankruptcy and most of its locations converting to Chuck E. Cheese's or closing down, many Z-Bops were either sold off or destroyed. Around 100 Z-Bops are still known to exist.