How about working as a waiter in a hotel?

There won't be any danger. The hotel is more formal, with strict hygiene requirements and high requirements on the quality of clothes and service attitude of the staff. If you worked as a waiter in a small hotel, where did you improve what you learned? You may not have all the people and things you have met, but there are many hotels, so if you have to choose, working as a waiter in a hotel will still improve your personal ability.