Perhaps you didn't understand the point. No one is saying we should place rules and laws over someone and basing their salvation on it. There are some today even that make abstaining from meat (on certain days or periods) a practice of their religion and count as sin anyone who does not follow it. They also restrict who can marry - imagine that.
That said, we have friends who ARE vegetarians and when we invite them to our home for a meal we only serve vegetarian foods. We show them respect this way. When we go out to eat with them, they are fine if we order meat in our meal. They show us respect in that as well. So this, I think is Paul's point. He can do without rather than offend someone. Would you still smoke around someone who didn't like smoke? Would it bother you to see your pastor drinking in a bar, coming out of an x-rated movie, chain-smoking? That was the real point anyway. I don't think very highly of grossly overweight preachers either. Their testimony should be important to them as it reflects their relationship with the Lord and those who look up to them.
This is the sort of twisting that makes your potentially legitimate argument absurd; equating a bar with an x-rated movie house. There is no equation, except in your mind. And “chain smoking”? I’ve already said that moderation is the key for everyone. So why continue to bring it up since it only demonstrates the absurdity of your views?
In fact my pastor and all our church officers are meeting at a bar tonight to have our monthly leadership meeting. Are you offended by that? Should you be?