Only one person can fit in there with the hatch closed I have read.
It does look like it would be very cramped in there http://upload.wikimedia.org/wikipedia/commons/7/73/ISS-30_Andr%C3%A9_Kuipers_in_the_Cupola.jpg, but then there is this http://i.dailymail.co.uk/i/pix/2011/07/18/article-0-0D0DB6DE00000578-740_634x422.jpg
and this http://i.space.com/images/i/000/009/586/i02/most-women-in-space-1.jpg?1305236084!
