Welp, it's impossible to get the most hardcore endings in Part 2 and continue with the story. All of them need alcohol 3+ (which means cocktails in bar + pizza wine) which in turn means you are not sober. You can bribe out public indecency from cop but no DUI (but requirement to pass money check is funny).
However it is possible to enter code for Part 2 with Sober 0 and Alco 3+.
BJ in streets need perfect game, but because the unavoidable Inf Lust catastrophes in bar and strip club are minus points and not set values, you can prepare for them and recover to 95 (maybe even 100) Lust before leaving.
completed #1 to #3 in one session & got blowjob in the alley without any forms of cheating or manually replaying pages to increase inf/lust in having sex with brigitte in stripclub. after both of you strip in the alleyway, trying to always look at brigittes face. there is a page where you can look up at brigitte or look down at your penis & her pussy. you basicly need to look up at brigittes face when this happens.
used the code from my above play that i got after completing brigitte #2 and this time in brigitte #3 i went the way where brigitte dances on stage at the stripclub. i got the same blowjob at the alley without any forms of cheating or manually replaying the pages to increase inf/lust. the lust choice seems to exactly match required to get blowjob so you need to choose every choice that has the lust increase since missing one lust choice will mean not enough lust for the blowjob in the alley. there is a "hiden" lust choice in the stripclub where the image has 2 choices (1 choice doesnt increase lust and 1 choice increases lust by 5).
after the alley blowjob in sex with brigitte in stripclub path as well as the brigitte dancing in the stripclub path, you get maximum inf/lust scores. there are a few choices that will bring it down slitely by the time you reach brigittes appartment if you pick wrong choices.
i dint make any wrong choices and got the image below without replaying parts to increase inf/lust or modifying code/inf/lust in game. brigitte #3 ends at this point for brigitte #4 with my gameplay from having sex with brigitte in stripclub as well as brigitte dancing on stage at stripclub.