If
you are a patron in a nonsmoking venue then you can expect to not have anyone
smoke near you.
As a member of the public, you could point out that
the area is nonsmoking and ask them to stop. Let the occupier know the situation.
If someone continues to smoke, the occupier is required to take steps. They could
call the Police who can issue on-the-spot fines.
If the situation
occurs in a workplace, Work Health Officers are empowered to issue on-the-spot
fines.
The experience in all other States and Territories has been
that smokers are more than willing to comply with smokefree legislation.