Night at the Museum has genre FantasyFantasy has examples: Harry Potter and the Prisoner of Azkaban. Harry Potter and the Prisoner of Azkaban has genre Family
[Human]: I liked Night at the Museum movie, can you recommend me similar movies? [Assistant]: Absolutely! Do you prefer fantasy or family films? [Human]: I am crazy about fantasy movies like  Harry Potter series! 
In that case, you might enjoy Fantastic Beasts and Where to Find Them. Have you seen that one?