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The main exhibits are as follows:

1) The Dinosaur Den
2) The Ancient Archives
3) The Rockin' Rocks
4) The Big Bang Burrow
5) The Space Space

Once the security door is sealed on any of these exhibits, it will never open again.
All of the above exhibits have an AC unit

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Then there is:

7) Main Hall

The Main Hall will never be sealed off
However, the Main Hall has an AC unit. you can die of cold. However, since it's the biggest room, everyone can huddle together for warmth, only half of you (rounded up) will die.

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The non-exhibit rooms are as follows,

8) The IMAX Movie Theater - No Hypothermia risk
The first night that this is visited will show the movie to them! A night showing! What's this movie about? Something about the history of TWG...what even is that? Does anyone really even care?
The movie will only show if a non-mafia is in the movie theater.
the following day, a posting of how many were in attendance of the movie will be shown, regardless of alignment.
Since the air-conditioning is pre-set to "uncomfortably cold", as are all movie theaters, you're guaranteed to not die of hypothermia in this room.
Seals after first movie showing

9) The Kidz Zone - No Hypothermia risk
collapses if more than 1 person hides here at the same time, killing them all
has no air-conditioning unit to keep kids miserable, and your butt alive as you hide in the dirty jungle gym climbing thing
Does not seal until collapse

10) The Security Booth
If more than one person accesses the security booth, the security system ejects them all into the main hall. You may view the footage, looking for 1 specific player in the footage. You know that every room except for the AC CONTROL Room has working security cameras. You only will be able to check if you can see that one person in the security cam footage. You will be pmed the location that they're at, at the end of the night. If they can't be found, they will be "nowhere to be found" (a.k.a. in the AC Control room)
Does not seal, but you may be frozen

11) The Bathrooms - No Hypothermia risk
There's only three toilets, but no risk of getting your butt frozen. Since the museum is not funded well, the toilets clog upon one use. Once 3 people have visited the bathrooms, the bathroom will overflow and be unavailable for use anymore. If the stalls are full, you'll be redirected to the main hall

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There are 3 mafia among 13 people.

The mafia are:
2 Normal Mafia Goons
1 Mafia Movie Stalker
This mafia will sit in the movie theater each night until the movie shows. When the movie does show, he can choose to kill one of the moviegoers during the movie. Does not count as a movie "attendee" since he doesn't actually have a ticket to the movie! Becomes a normal mafia goon afterwards

The mafia may hide in the "AC CONTROL ROOM" and get to pick a room to crank it up on each night.

There are 2 special roles amongst the humans
2 homeless guys - since they're used to living on the streets, one night of being frozen won't kill them. Plus, they can escape from sealed rooms between the bars because they're that skinny (for sake of continuity and not getting trapped in rooms whee). For clarification, there is no way to tell them apart, they get the same exact PM.