Does Smoking or taking tea etc..., affect the work whether good or bad?

The quality and standard of work need not be compromised or affected because a person smokes or likes to drink coffee. 

What might affect the worker negatively is if that privilege is suddenly taken away without an explanation. In western cultures, there are spaces that are governed by law and restricts smoking in an enclosed area of public place. There are designated smoke areas.

if there are laws that govern smoking in public places then workers adapt quickly and easily. If not, then the organization should give a grace period before any company regulation is put in place.

Thanks for the invitation. Some people possess a notion that smoking helps you in being focused at your work but they don't look at the other side of the picture that how badly is it damaging your health too. Tea is a good thing to be taken during working hours.

I prefer to differentiate between smoking and having tea/coffee.

Medically both have their dangers but smoking is a real danger.

I know that both have a good effect on concentration but good night sleep can have a better effect.

This depends on person to person. Smoking and excessive use of tea/coffee are bad habits and injurious to health. Unfortunately people are used to those bad habits. specially Arabic People feel proud to take Turkish or black coffee more than ten times a day.

By the way, your question is related to personal habits of people rather than technical and controversy to the specialities.

In my opinion, everyone is the owner of its own body,  when we are talking in work, policies should be applied in the way that any option (tea, music, coffee, smoking,...) should respect the health of our work cheap, our neighbor.

Our choice should affect only oneself... we can not disturb the work environment just to respect and be polite with the other ones.

Thanks for invitation

For me tea is the good thing make me more active & creative

Smoking is all time bad but taking tea is some time bad & some time good.

Excess of everything is bad...............If taken in limits then Ok....Smoking is slow poisoning hence should be avoided.

Some people good for them and some are not.

Thanks for the invitation

Some people good for them and some are not.