I played the game sometime this year and in the game mode with the overgrown building, all girls were loose unless something has changed by now.
Viewing post in It's time for the ROADMAP comments
It has been the same for a really long time, even before nightclub released.
Misty is not active until day 2
Ari becomes active on day 4
Maddie becomes active day 5
I do admit that you get nothing new until Bloodmoon Ari on night 12 so the girls are introduced within the first 5 nights then you get 7 nights of the girls just getting harder until the boss fight.