I was in St Lukes last year and they're fine with you having a few beers. We had a couple of parties but made sure we weren't too loud and kept ourselves to ourselves. It's the noise they don't like. But they didn't care about alcohol at all. Just watch for them barging in without knocking (or knocking after they've opened the door) and this includes bedrooms.
Also, you're likely to have an alcohol test on your first or second day (morning) so be careful about that.