The drink stand is a location in the series.
The drink stand can be found in Shibuya. Every Sundays, the protagonist is able to buy a drink for ¥5,000, without passing time. One drink is offered every time. If he accepts to purchase, he'll gain a specific Social Stat boost to one of his stats by 1 note. Chihaya's Luck Reading multiplier works here.
If the protagonist does buy the drink, the next offer will change via rotation; if he does not buy it, the current drink will be the same the next week. The drinks rotate in this order: