cigar shop lounge etiquette?

The few times I've smoked in my local B&M, I bought what I smoked right before lighting up. Usually had a few others I bought too, but took them home. I have sat in there and seen guys come in from outside and go straight to a seat and pull out a stick they brought in a light up. Never buying anything. I'm pretty sure at least 2 of the guys I saw do this were regulars though. They were conversing with the owner a good bit on first name basis.