designnimbus:

Love/hate is a series of seats that encourage both social and anti-social behaviour. The option to adapt the seating arrangement is removed, forcing users into unfamiliar positions. The result is a specific behaviour that is driven by the space created; whether that is a moment of solitude, or an awkward conversation spurred by the accidental touching of the user’s knees.

more: http://www.coroflot.com/craigfoster/Lovehate