It is an Eastern Orthodox Church, Russian by jurisdiction but really only about 50% Russians attend. Excess drinking would be frowned upon but alcohol certainly isn't taboo (I mean what Russian would go without drinking vodka?).
If you are interested in what kind of church that is just PM me and I can send some resources, I wouldn't want to get into too much religious history or stuff like that here.
For the most part any church ending with "Orthodox" (Russian, Greek, Antiochian) are all going to be pretty much similar, they have have different geographical origins.