My question is, are residence halls typically strict when it comes to rules? Especially rules concerning guests. 
Yes. If the rules say, "No members of the opposite sex after so and so time", they mean that. The same for, "No members under the age of *insert age here*, nor older than *insert another age here".
I'd look into the rules. Some dorms don't even allow guests, without Housing Admin knowing of it. Some don't allow you to have ANYONE spend the night. It depends on the school.
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