Some of the existing answers take the approach of convincing the smoker to just wait until everyone who is sensitive to smoke has gone home. That's not enough -- even if the smoker only smokes when they are alone in the office, the smoke gets into everything and can cause problems for sensitive people the next day or in the longer term. (It can also cause long term damage to computers and other office equipment.)
In any case, it doesn't matter -- it's illegal to smoke in the office. Period. It's an OSHA violation, it may cause problems with insurance, and more and more, society sees it as just plain rude.
I'd put it in email so there is a paper trail:
Please don't smoke in the office in the evenings. In addition to it being illegal, bad for the computers, and probably a violation of the fire insurance policy, it's directly affecting the health of several of your co-workers.
Please step outside to take your smoke breaks in the evening, as you already do during the day; we know it's inconvenient, but your smoking is inconveniencing everyone else, especially those who are still in the office and directly exposed to your second-hand smoke.
(and on behalf of other members of the OfficeName team.)
If that letter doesn't make the office smoking stop (and it is unlikely to, as you said the owner has already tried), then you can follow up with a letter to the owner (forwarding a copy of the first email, and any email response the smoker is unwise enough to send) where you request that he address the conditions in the office, mentioning how many times you and others have already spoken to him about the problem.
I know you have tried before to address this issue, but it's helpful to get a paper trail of this long-standing problem before you file a complaint with OSHA or your state regulatory agency.