There are many stories of businesses going out and people loosing jobs from this ban. But of course the media suppressed most of them. One of our popular restaurants actually built a take out window hoping to regain the clientele who smoke in hopes they'd "pick up" and eat at home. It didn't work.
Take out business did pick up in places that were predominantly eat in, and so that really hurt the wait staff. And in home catering picked up big time - at first. It fell off right after the holidays.
Granted I’m only speaking of where I lived at the time (2002, Dover DE) but the ban went into effect the night before Thanksgiving. Private parties in local restaurants were cancelled left and right-— some of which had been booked BEFORE the ban was even voted on. Places like the Elks, Moose, and VFW all got more private business party reservations than they could handle - because restaurants were no longer able to accommodate the clients that had booked the place to begin with.