of hands dealt and rake earned by the casino), many casinos require players to buy chips from a cashier - to assist players, some establishments employ chip runners to bring cash and chips to and from the tables. Many casinos have a dedicated cashier station located in or very near the poker room, although in some (usually, smaller venues) the same cashier station that handles other transactions will also handle poker-related purchases. In addition, if the casino uses the same chips for poker as for other games then it is often possible to bring chips from such games to the poker table. Touching another player's chips without permission is a serious breach of protocol and can result in the player being barred from the casino. Most tournaments and many cash games require that larger denomination chips be stacked in front (i.e., closer to the center of the table, or closer to the pot) of the player's lesser denomination chips, or at least stacked in such a manner that they can be easily seen by all opponents. This rule is employed to discourage attempts to conceal stack size. Some casinos discourage, prohibit or simply refrain from circulating larger chip denominations to prevent them from being used in lower-stakes cash games, although the drawback is that larger stacks won during play will become more difficult to handle and manage as a result. Some informal games allow a bet to be made by placing the amount of cash on the table without converting it to chips, as this speeds up play. However, table stakes rules strictly prohibit this from being done while a hand is in progress. Other drawbacks to using cash include the ease with which cash can be "ratholed", which is normally disallowed, in addition to the security risk of leaving cash on the table. As a result, many games and virtually all casinos require a formal "buy-in" when a player wishes to increase their stake, or at least require any cash placed on the table to be converted into chips as quickly as possible. Players in home games typically have both cash and chips available; thus, if money for expenses other than bets is needed, such as food, drinks and fresh decks of cards, many players typically pay out of pocket. Some players (especially professionals) loath removing any part of their stack from play for any reason, especially once their