So, I've played the demo and if you don't drink, you arrive earlier in the RPD and find it in a better condition with different people inside. The story is indeed drastically altered like the creator suggests. Very interesting stuff!
There are also other minor decisions that I'm not sure right now how they affect the story. Like putting the tv dinner back on the self. (i.e., when the little girl accuses you of also stealing you are able to defend yourself)