Each day at the Stray Sheep, be sure to drink Whisky at least 3 times. To take a sip press while sitting at your booth with your friends. Once you finish a drink (three sips), you will get a piece of trivia on that drink, and will be able to order another from Erica. When she comes to your booth request Whisky by pressing and she will bring it to you. Boss the bartender can also take your drink orders up front when you sit there. On the 8th Day, you will unlock the achievement if you have received all the minutiae for Whisky. See Sake Sensei for more information.