I think people can do whatever they want. I can't really drink thursdays this semester. Its not because I am challenging myself so much, it is just how my schedule worked out. This semester I can drink on monday nights, if i want, because I don't have class till 2 on tuesday. I usually choose not to, but thats just me. It doesnt mean I spend the whole night studying instead.
However I will say this, I have drank a lot on thursdays in the past (last semester pretty much every night.) and the next day is just a total scrub most of the time and I am just pissed off and dont learn. So I changed my habits.
I guess what I'm trying to say, is that I don't really give a fuck what other people do. If you can't find things to do on thursdays that don't involve drinking, and you don't want to drink, that sucks, but it sounds like a personal problem to me.
Please disregard the previous 3 paragraphs, I need sleep, I am not thinking properly at all...