will not worry.
when out and about on vacation, bring the hotel’s business card (or something with their name on it) with you. if you become lost, you can show it to a local and get directions back to the hotel. this is really helpful if you don’t know the language well.
for most people, staying at a fancy hotel is not an option. take a plain doorstop with you for these situations. you can wedge it in under the door to your room overnight (in addition to the lock and chain, of course). it is relatively easy for an intruder to compromise a chain or lock, but it will be almost 