doesnt your right to consume tabacco infringe upon my right to fresh clean air?
Where is the right to fresh clean air? And where, outside of a mountain top, can you find such stuff?
Once you step over the threshold of a privately owned business it is (or would be, in a free country) the
owner's decision. If he decides he wants to allow smoking, and you don't like it, you have only two rights - the right to leave, and the right to tell the owner why you're leaving. You do not have the right to tell him how to run his business.
Oh, and you also have the right to open your
own venue and make your own rules. I have never, ever heard of a nicotine nazi doing that, though. Their only method of operation is to use Big Brother to force business owners to cater to their whims. And in the process, they've destroyed thousands of businesses.