What is the ruling on selling tea, coffee, and popular dishes in a weekly market when there are smokers in the tent designated for selling?

If you do not sell cigarettes to smokers, then there is no sin upon you if they smoke in your tent designated for selling permissible items, as Allah Almighty says: "And no bearer of burdens will bear the burden of another," because you did not assist them in the disobedience. However, you must denounce the evil according to your ability, and putting up a sign with advice for smokers is considered a good deed.