[Jtsummers]

The issue at that convention center (from my experiences there) are that multiple events really occupy the same space, not adjacent spaces. Like if there are 4 event halls in a row with two groups (A and B) it won't be AAAB, it'll be ABAA. And you have to travel through the common (very large) hallway to get to these areas.

I could understand parents being somewhat disconcerted with finding their teenage daughters surrounded by a bunch of adult men. Especially if they didn't know that another convention was going on (at first). Imagine you take a large group of young teenage girls somewhere and find that there are a couple thousand adult men seemingly at the same event. At first it'd seem very odd.