In my chapter we don't drink in our letters, period. If a member forgets, he is reminded and has to turn his shirt inside-out.
It's a pride issue as well as a perception issue.
Our campus is dry and unfortunately there are members of a recently booted national fraternity that are hell-bent on getting other chapters banned.
We've been informed that they check party pic sites, etc to collect evidence against other fraternities. 2 Other houses just got suspended for certain allegations so our safety is very important to us at this point.
So it's also a self-preservation issue