My Delta Zeta chapter has strict rules about smoking, as do all of the other chapters that I've visited. We can not smoke in letters, we can't smoke in the sorority house or out in front of it, and we can only smoke sitting down with our legs crossed. Sounds strange I know, but the theory is that sitting in a ladylike position while smoking looks a lot better than running around campus waving a cigarette. Anyway, I do live in the South and all of the DZ chapters that I've visited have been at Southern schools, so it may very well be a Southern thing.