There are 2 types of currency on Habbo Hotel. Credits (or coins) which are used to buy furniture in the catologue and Pixels (free currency, you get 10 every 15 minutes) where you can buy effects and 'Hello Furni' (the furniture you get for free when you pick a room when you register.)
There are two types of chat rooms within the virtual hotel. The interface of both chat rooms remains the same, however, the designs portrayed as rooms themselves differ.
Public Rooms are rooms which are available to all members. They often depict scenes such as restaurants, cinemas, and dance clubs. Most Public Rooms contain automated robots which shout pre-recorded messages and can give members drinks and food items. Public rooms are designed by Sulake and are not customisable by users.
There are two types of public rooms: widescreen and regular size. Users with a higher screen resolution will see the widescreen rooms, while users with a smaller screen resolution will see smaller size rooms.
Guest Rooms are rooms which users can customise to endless lengths with virtual furniture, wallpaper and floor patterns, and which can be purchased with credits. Users can also choose from a range of room templates that determine what shape the room is. Guest rooms can be created by any member and can be locked to allow access only to specific users or password holder.
Exchange is Habbo Coins Currency which can be transferred from real money to habbo money. The user must first pay Habbo to receive the exchange (coins). Exchange are mainly used to buy HC (Habbo Club) which gives the user extra features such as New Colours, New Clothes, New Looks etc.
Credits, (prieviously called Coins) can be purchased using a variety of different services, such as credit card, a telephone service and via SMS. The credits are stored in the user's purse, accessible in any public or private room as well as on the Hotel view and while logged in on the website.