First, its just poor taste to pop into someones place unless invited. unannounced visits are unacceptable especially to an elder's place or where decorum is expected (with an advisor, administrator, etc)
Secondly... I just dont get the whole drinking at bars in letters thing. As a group several years ago we decided as a chapter not to do it, but more importantly,
why would you? I mean, its
trashy. If I am going out for a few drinks, even casually, I will make every attempt to look nice (never know when you are gonna bump into someone ya wanna hook up with). Where I come from, a t-shirt or sweatshirt with fabric sewn on it (even if they are my letters) is kinda trashy. I dont care what kinda dive bar it is you aint gonna catch me in a shirt without buttons on it, a nice sweater or classy pullover. In my house, party shirts (what we call rush shirts, party shirts or event shirts) are acceptable to wear to a bar, but again,
who goes to a bar in a t-shirt? thats not only something you should get bawled out by your exec for, but should get pulled over by the fashion police and given a citation. (Do you also go in the acid wash Guess jeans, White keapas and the really crunchy koosh-ball hair?) the only time I have had an opportunity to be drinking in a letter t-shirt was at Spring Break on South padre Island. I promptly took off my letter shirt proudly displaying my pasty white-ass needin a tan chest.

(now THAT was deserving of a citation).