It takes two people to do this

“Dance”

While the tango is a type of dance that requires two people, the term 'dance' is too broad and can refer to many forms of solo or group dancing.

“Handshake”

A handshake is an action that involves two people, but it doesn't fit the context of a structured activity like the tango, which is a specific type of dance.

“Fight”

Although a fight can involve two people, it is not an activity that is typically recognized as a cooperative or artistic endeavor like the tango.