response.addInt(rooms.size());
for(Room r : rooms) {
response.addInt(r.getId());
response.addString(r.getName());
response.addBool(true); //?
response.addInt(r.getOwner());
response.addString(H4J.getDAO().getUserDAO().getUsernameById(r.getOwner()));
response.addInt(r.getState());
response.addInt(r.getParty().size()); //current users
response.addInt(50);