DS will be 3 1/2 on our cruise, potty trained. How do the open house hours work with the club? I see on some navigators that there are times there are open house hours in the club, but scheduled activities in the lab, or vice versa. Can I take DS to an open house in the lab if there are scheduled activities in the club? I've tried to read up, but I'm just not getting how this open house thing is supposed to work. We are happy to have times when we can be with DS and play without having to drop him off (that was a major issue on another cruise line), but I find it confusing and inadequately explained on the DCL site.