open locks with a credit card

Credit cards only open locks in films or on really badly fitted doors, but thin plastic sheet can open many locks for next to no cost.

Make rim latch (yale lock) opening sheets
from plastic bottles (beer or cider are best)

cut 80mm slices from the bottle, open out and cut to 200mm long, Fold the leading corner over to give it a start then use this like a credit card while applying slight pushing pressure to the door, or try shaking the door. Practice on your own door first.