Mm not the author but i did it witout the walkthrough:D
Talk to the guy,then drug him,talk to the asian,talk to her again.Buy her drink,she will refuse this drink.Write in"Persuade asian to drink"She will take a number of shots type"Kiss asian" she will kiss you back,write in "Take asian home"And Viola!
Youve Expanded Your weiners cultural learnings :D
Awesome game btw