We hired Dan's place for a week for a company work trip - there were 14 of us but there was room for more. The flat is great - in a great location, quiet at night, with some outdoor space downstairs and a helpful building superintendent. One of the bedrooms can also double-up as a lounge area. Don't expect a super-polished experience - the kitchen in particular is fairly basic - but it is excellent value for money and a reliable option for a very large group.