I can't see how (if you chose that path) you not being a client can be kept internal to the HOTs.
Maya will know as Quinn forces her to be a girl which means Josy will know and she'll probably share it with Jill (out of a growing friendship or in a jealous rage) who'll ofc tell Bella when she starts crying about it.
I just can't see how going down that route is going to result in any kind of happy ending (pun aside) unless you are gunning for some kind of Quinn/Riona ending that doesn't yet seem on the cards.
sorry, maybe I didn't explain myself well
I think the drug problem will have important consequences, and it could become a known issue for everyone (students, teachers, police).
while the question of the restaurant will always be important in the story, but mainly for the internal dynamics of HOT (forced girls, repentant girls, blackmail etc ..)
about the situation you underline, if MC has used the restaurant, I doubt it will have real consequences, in the end it is a "side quest". it would be too sudden a crossroads.
then like many other MC actions, in real life, it could have any consequence (the adventure with Jade, some unwanted pregnancy etc)