It's not even worth doing the 'shocked shocked' routine for so he just leans on the fence, a bit. "More or less gave it up." More or less when he moved on to harder stuff. Even more really when Julien found him and decided he might be useful and put a quite forcible stop to Justin's habits.

"Just fancy a spot of booze now and then now." And yes, he did just put on his mockery of a hoity-toity upper crust Deckian. Sounds rather like quite a few Diamonds, actually.