On 1 January 2020 it became illegal to smoke in eating establishments in Malaysia. Neither customers nor staff are permitted to smoke in any such premises and must be over 3 meters away from those premises if they do smoke. Preparations for the ban have been ongoing since 1 January 2019 and have included education campaigns as well as inspections ensuring that notices have been put up in all applicable premises.

Sources: https://www.nst.com.my/news/nation/2019/12/552203/are-people-ready-smoking-ban

https://www.nst.com.my/news/nation/2019/12/551849/smoking-ban-all-eateries-comes-force-wednesday