After studying the problem further, the company decided to go smoke-free in all buildings.

The airlines say they are responding to consumer demand by going smoke-free.

"If one mall is going smoke-free, the others are going to look into the response and follow."

But his concern with going smoke-free, he said, is that the ban would be impossible to enforce.

At malls going smoke-free, directors say they will rely on the honor system.

He said nursing homes should have the option of going smoke-free if they so choose.

The first group of such places went smoke-free on 1 September 2009.

"Every study shows that going smoke-free is not going to hurt their business," she said.

"If anything, they may pick up some business by going smoke-free."

Until my home state of Colorado went smoke-free on July 1.