If you ask an engineer what a bridge is made of, he or she might say steel and concrete. But if you ask the owners of Broken Arrow Roller Sports, the response might be polished floors and wheels. The facility doesn't construct bridges, per se, but it is in the business of connecting things–albeit families, friends, and different generations altogether. Groups find a common interest in gliding across the roller-skating floor, which Broken Arrow surrounds with a host of other activities that includes an arcade, a snack shop, and free Wi-Fi. The rink also rents itself out for private birthdays, enabling party hosts to invite as many guests as they want and avoid having to instill the one-in, one-out rule that dominates most other birthday parties.