The Sociable or "Buddy Bike" is a bicycle that supports two riders who sit side by side.
This type of bicycle should not be referred to as a tandem bicycle as "tandem" is defined as: "a group of two or more arranged one behind the other ...
The Sociable was invented by Hubert Opperman
In its basic form it has been around for over 100 years. It was originally marketed by the Punnett Cycle Company. Historically it has been used as a courting
bike, gentlemen would be able to spend time with young ladies in an activity that allowed closer proximity.