The instructions to drink on day 6 are... odd, to say the least. I understand they want you to feel the effects and all, but do you really need to do that?? I think I'd take their word for it.
Anyway, it seems from reading your post I get the sense that you enjoyed being in that bar and participating, and that by bowing out somewhat gracefully at the point you chose to, you are minimizing or justifying your actions as a sort of harm reduction in this situation. That is how it reads to me, anyway.
Like, I only drank 5 glasses of wine instead of 10.
Can you examine carefully the point where you left the pharmacy and made your way to the bar? That is the critical point, imo. Or were you planning to before you went to the pharmacy?