I don't know how smoking policies are enforced with the other sororities, but there's no rule with my chapter saying that we're not allowed to smoke at all.

In our code of standards, the only time smoking is prohibited is during chapter meetings, events, rush events, or any other time deemed inappropriate. In those cases, we use our best judgement (especially when wearing our letters and/or representing our sorority).

We don't have a chapter house, but I'm pretty certain that most (if not all) chapter houses in my sorority enforce a no-smoking in the house policy.

I'm a smoker, so whenever I do decide to smoke I make sure that I'm in a designated smoking area on or off campus.