Be normal

Act normally.
Use regular clothes.
Say ordinary things.
Smile normal smiles.
Be like an undercover agent.
You're in great danger if they blow your cover.
It helps a lot if you can forget about your true self.
A true self is useless here.
Do not question their views.
Get yourself a hobby.
To be a supporter of a sports team can be helpful,
but do not go to extremes.