The Real World Brooklyn was previously reported (http://hubpages.com/hub/The-Real-World-Brooklyn)to be 

moving in to the BellTel lofts, but with slow renovations, the

cast is said now be housed at Pier 41 in Red Hook.  The address

is 204 Van Dyke St. (http://maps.google.com/maps?hl=en&q=204+van+dyke+st.+brooklyn+ny&um=1&ie=UTF-8&sa=X&oi=geocode_result&resnum=1&ct=image)

Nearby is a brand new IKEA which has furnished the Real World 

for many seasons.

 Since MTV's tradition on the Hills and other reality shows is

to sign a waiver for a couple Bars and Restaurants before 

shooting, so billons of other clearance forms aren't necessary

(ever wonder why on the Hills they always go to Area & Les Deux?

And last season's Real World was always at Tokio or IO West

even when NOT working).  A quick search of Red Hook bars led me

to these 2 which might be possible hangouts for the 7 strangers,

as they're not the typical dive bar that Red Hook is host to.

http://www.brooklynbotanica.com/

http://www.rockysullivans.com/

As far as sightings of the cast, New Yorkology (http://www.newyorkology.com/archives/2008/08/is_that_real_wo.php) posted these pics of the cast from Beard St. on August 15th.