After buying a fair quantity of coffee, Brewster will add pigeon milk to the drink, which appears to be light brown, different than the usual coffee he serves. After a while Brewster will appear to be friendlier towards the player, which will eventually open up the option for him/her to store the player's gyroids, as well open up new conversations with Brewster. Coffee costs 200 bells. Only in Animal Crossing: Wild World and Animal Crossing: City Folk.
In Animal Crossing: Wild World, coffee can not be purchased in another town when visiting. In Animal Crossing: City Folk and Animal Crossing: New Leaf the player can buy coffee at another town. In Animal Crossing: New Leaf the player can also buy to-go coffee at the counter but will not be able to work at The Roost in the town. Neither can the player who lives in the town or the mayor work at The Roost until the player or mayor ends the local or wireless play.
In Animal Crossing: New Leaf, after drinking 3 coffees, Brewster will allow to player to get to-go coffee across the counter the following day, then the player will be able to hold it outside as a held item, and drink it by pressing A. It will be fully consumed after 5 drinks. After purchasing 6 coffees, Brewster will allow the player to work at The Roost serving coffee to villagers in the player's town, special villagers, and other villagers outside the the player's town, with each one having their own coffee preferences. Depending on how good of a job the player does, they will be awarded coffee beans of various qualities. The coffee beans main use is to be sold for a profit. Coffee themed furniture may be received by getting many orders correct.
- 'Pigeon milk', or 'crop milk' is a substance that is produced by all pigeons and doves, as well as some flamingos. Crop milk is produced in the 'crop', which is where birds store food temporarily. It is almost nothing like mammalian milk.
- In Animal Crossing: City Folk and Animal Crossing: New Leaf, on Valentine's Day, coffee changes into hot chocolate, and Brewster is a little more open to the player.
- In a conversation with a uchi villager, they may ask Brewster during the winter, "Hey, Brewster, that winter blend you were working on... What did you end up naming it?" Brewster will either respond with "...Winter Coffee.", "...Winter Storm.", or remain silent with "..."