Obviously you should be cordial, with a smile on your face and treat everyone like royalty (ie: grovel a bit) that should help.
But if your employer permits it (and ONLY IF) you could try a humorous approach by making a little tag or button for yourself to wear which says something like “Tipping is not a city in China” or something like that. This lets folks know that it is appropriate for them if they wish to because as others have pointed out, many places don’t allow it.
This lets folks know without pressuring them or putting them on the spot. some will appreciate the tongue-in-cheek humor.
I used to use something like this and similar when I used to work as a street performer doing balloon sculpture so folks knew that I wasn’t being paid by anyone else as is sometimes the case when hired by a store for promotion and such.