I'd be more worried about my lungs than the stereo.
But the equipment is not really harmed by such minimal occasional smoking. The problem is the heavy smoker with no ventilation. Stuff from such a place just plain stinks, and stinks bad.
Some folks are very sensitive about the smell of tobacco smoke, and they might complain about buying your stuff someday.
I personally would not allow smokers to smoke in my place.
(unless they wore a plastic baggie over their heads...)
But the equipment is not really harmed by such minimal occasional smoking. The problem is the heavy smoker with no ventilation. Stuff from such a place just plain stinks, and stinks bad.
Some folks are very sensitive about the smell of tobacco smoke, and they might complain about buying your stuff someday.
I personally would not allow smokers to smoke in my place.
(unless they wore a plastic baggie over their heads...)