Clap You
Clap You is based on a spectator activity similar to the act
of clapping, or applauding, in which approval is signified by
bringing hands together forcibly and repeatedly in such a way
as to produce a maximally resonating sound.
Only you can't clap your own hands.
And...
you can't clap both hands with the same person.
Similar rules can be found in the related game, Higher
Five.