The bar is a location you can visit. In here there will most likely be a person who is ''drunk on soda''. If you feed the person one food, the person will follow you and you can recruit him/her later. The bar is also the only location where you can find a bottle.
If you have a dog in your party, select the dog and you will get a special option to "lick the drunk person's face" this will wake up the drunk person without wasting a single unit of food.
If you have somebody with high medical in your party, you will be able to skip having to give the person food.