Going forward, you may want to put up “No Smoking” signs in Mandarin, if you are going to be hosting a lot people from that part of the word. I imagine there are many who travel to the Bay Area.
I know that Singapore and China are different countries, but many people living in Singpore came from Mainland China originally. Lots of cultural similarities, too.
Even the Chinese government has a hard time preventing people from smoking indoors. It’s common to see people lighting up right under a non-smoking sign.
I was on a high speed train from Shanghai to Beijing. You wouldn’t believe how many times an announcement came over intercom to remind passengers about the no-smoking rule, which is pretty new. At least 20. There was also a train Marshall who went up and down the train to make sure people complied. Yet people were still breaking the rules!
It’s a country and culture of chain-smokers who are not used to having to wait to smoke.
The signs should also mention the fines and deposit. Money talks.