The functionality of convenient addition of rooms in hotels has appeared in the new Open Real Estate version. An additional tab "Rooms" was developed in the editing form of hotels. The owner of an object can see all hotel rooms and add them as well in this tab in a tabular style.
Recently there were some changes in the work of Google Maps. Google no longer supports keyless access - http://googlegeodevelopers.blogspot.ru/2016/06/building-for-scale-updates-to-google.html