Another comment, when you ask for safety features, make sure you see fire extinguishers installed on their spots and not removed. Make sure it has a centralized fire alarm system, handrails on the stairs, ....

Make sure the building has at least two-three exit doors
Even ask the staff if they can work with a fire extinguisher. Ask tricky questions such as what is PASS! Google it, if you don't know it. Having just a good system is not enough. They must be able to work with it.

Again don't be shy! and if they refrain to answer, then say good bye to them.