Without getting into an argument over the folly of drug prohibition, I would point out that smoking crack or marijuana, and masturbating in public, are already illegal activities -- no special ban on masturbating in Burger King is neccessary (although I will now never again ask for "special sauce" just to be on the safe side ...)
Also, there are many private places of business where people assemble and drink alcohol already ... in actual public places, i.e. in city parks and on the street and so forth, this behaviour is usually forbidden. Because such places are actually public and not private places of business, then public laws regarding activities there are all well and good (the public owns the property, after all.) There are numerous privately-owned business in the world where you can smoke marijuana (mostly in the Netherlands) or masturbate (many porn theaters and similar establishments) with relative impunity.
Smoking bans are the product of a stupid, short-sighted, and morally weak society. You have no natural right to eat at Burger King. If you don't like what goes on at Burger King, there is always McDonald's (and, assuming that BK's are franchise-modeled and not corporate-owned [not sure] you might even be able to find another Burger King with a different policy.)
What I have never understood is the economics behind smoking in restaurants (just to make things simple and leave the argument to this one type of place.) The percentage of people in the United States who smoke is extremely low -- so if there is so much demand for smoke-free eating environments, one would think that it would be a cinch to just open smoke-free restaurants and be done with it -- a perfect market solution to a market problem (non-smokers generally do not wish to eat in a smoking environment, which is understandable -- I myself, incidentally, do not smoke, so I am not simply arguing as a pissed off smoker here. I can understand the basic concept of not wanting to eat or hang out in a cloud of smoke.)
However, except in isolated markets, this is rarely done. Instead, non-smokers push for government dicta which force the hand of businesses to bend to the fallacy of "the will of the people" and produce a smoke-free environment regardless of whether or not they want to do so, or more importantly whether or not the customers who pay the restaurant's bills want to.
In that you see what amounts to a default on both intelligence and morality, because the advocates of smoking bans have pushed for tighter and tighter legislation against smoking over the years -- first a smoking section, then a smoking section seperated by a true barrier, then no smoking in actual public places like government facilities, then no smoking in private places of business because the "public" goes there, and in some places already there are bans on smoking within a given distance of the door of a private business, as well as attempts at legislating whether or not people can smoke in their own homes if minors are present. In all this time, some bright non-smoker could have made himself a millionaire many times over by simply providing a smoke-free alternative to restaurants with smoking sections, and the mass of restaurants would probably have followed suit -- assuming that there is enough actual demand for smoke-free restaurants as the lobbying types would have you believe.
Banding together to push your agenda via government coercion is about the lowest form of human activity possible -- even in a case as relatively innocuous as a smoking ban, you're just a short leap from criminal coercion of people who have done nothing to you and never plan to. At least real criminals have the balls to commit their offences themselves; proponents of smoking bans and all other government-enforced prohibitons on the disposal and use of private property are in the end immoral cowards who lack the courage of conviction to just try to compete with what's out there by offering their solution as a voluntary alternative.
Phaedrus