To get the Penthouse you need to dress with clothes from the district you are in. At midnight when Dauris comes over, go into the district's VIP Room.
Once you are in there stay until he gives you the power social item. At 1:30 p.m a villian will come and mug you and other urbz. Use the district's power social on them and they will leave, dropping a part of Dauris's Secret Machine.
Defeat the villian at all nine districts and you will unlock Dauris' Penthouse.