Put a small NO SMOKING sign wherever a visitor can most easily see it.

Magnet and ribbon versions are on backerboard and protected with plastic.
Velcro® version is on mat board and protected with plastic

My "NO SMOKING" signs and magnets are currently unavailable.
 
 

design no.1, with a face ~~ 2.4" wide, 3.25" tall ~~	with magnet strips on the back
	with Velcro® tab on the back
	with blue ribbon (shown above)

 
 
 

design no.2, with words ~~ 2.0" wide, 3.4" tall ~~	with magnet strips on the back
	with Velcro® tab on the back
	with blue ribbon (not shown)