Security minded types might still stop you, especially since these are the kind of well-known scenarios that might get used in security training.

You want invisible? Be female, 40+, short but otherwise average build, any skin colour but white, black hair, generic cleaning staff outfit, and one of those carts with mops and buckets. Now you're invisible (racist, classist, and misogynistic biases exist, might as well use them).

(As a 2m tall person I can't blend in anywhere.)