Feel free to join in by decorating your place for halloween. And of course residents in my sim rose are REALLY encouraged to decorate. In my shop in rose 198,131 I will be placing a few halloween decorations free of charge, there is one there already but I will be placing more.
Feel free to contact me about holding a octoberfest event in rose, or to join in.
There are some plans to make a tour for octoberfest that someone is working on currently so if you decorate your place and contact me, you may be put on the tour.