The Roost Café
From Nookipedia, the Animal Crossing wiki
The Roost Café is a public works project in Animal Crossing: New Leaf, very similar to The Roost in Animal Crossing: Wild World and Animal Crossing: City Folk. Run by Brewster, it serves various blends of coffee for 200 Bells. The player may also get a part time job at the café after having seven cups of coffee by talking to Brewster while standing to the right side of the bar.
In order to unlock the Roost Café as a public works project, the player must have already constructed the Museum Shop and have donated at least fifty items to the Museum. After the shop has been open at least seven days, Blathers may be found thinking in the Museum. When the player speaks to him, he will add the Roost Café to the town's list of public works projects at the cost of 298,000 Bells.
 Buying Coffee
The player can buy a cup of coffee for 200 Bells; after drinking four cups, the player is given the option of getting coffee to go. Buying coffee to go from the right side of the bar counts as the player's one purchasable cup per day. Special characters and villagers will sometimes be found in the café as in previous games, but in New Leaf, the player may have villagers visit from another town.
 Part Time Job
At the Roost Café, the player can get a part time job after having seven cups of coffee. On the job, the player will have a random selection of four villagers, from their town or another, come and get coffee. Each animal has a combination of the three ingredients — coffee beans, milk, and sugar — that they like best. If the player satisfies the customers, coffee beans will be awarded by Brewster. As the player continues to keep customers happy, Brewster will reward the player with café-style furniture items, including four different special Brewster-themed Gyroids. Note: You may only work from 11 am to 11 pm, when no events are taking place in town.
 Coffee Preferences
Every special character and villager has a favorite combination of coffee beans, milk, and sugar. There are four different options for each category: coffee beans (Blend, Blue Mountain, Kilimanjaro, and Mocha), milk (none, a little, so-so, and a lot), and sugar (none, one lump, two lumps, and three lumps).
 Coffee Beans
Every time the player works, Brewster will reward the player with coffee beans, which can be sold for bells or given to villagers to boost their friendship with the player. The three types of are plain (500 bells), good (1000 bells), and superb coffee beans (2000 bells).
The café-themed furniture is rewarded by the total number of customers made happy. The list below shows the furniture and the number of correct orders needed.
 Encountering Special Characters
At certain times during the day, special characters will appear at the café. The following table shows who will appear and at what time.