This is quite interesting, a more kind of similar stagnant version of Antony Gormley's 4th plinth.
Marina Abramović is sitting in the MOMA in New York and inviting people to sit with her in silence. I originally thought it would be rather nice to sit with someone in a museum in silence, until I found out that you actually had to sit opposite her, at that point, I thought it would be far to intense, uncomfortable, personal space and the like. Do you look at the other person, in the eyes? Or do you look over their shoulder, at the crowd, with closed eyes?! God knows.
Apparently numerous famous people have popped by, from actors, to writers, to fellow artists and of course the general public.
Here are the portraits of those who sit with her and how long they stuck it out for.