Roulette | Gambling Game - Britannica

Equipment

The roulette table is composed of two sections, the wheel itself and the betting layout, better known as the roulette layout. There are two styles of roulette tables. One has a single betting layout with the roulette wheel at one end, and the other has two layouts with the wheel in the centre. The wheel spins horizontally.

Heading the layout design, which is printed on green baize, is a space containing the figure 0 (European style) or the figures 0 and 00 (American style, although such wheels were used also in Europe during the 18th and 19th centuries). The main portion of the design is composed of 36 consecutively numbered rectangular spaces, alternately coloured red and black and arranged in three columns of 12 spaces each, beginning with 1 at the top and concluding with 36 at the bottom. Directly below the numbers are three blank spaces (on some layouts these are marked “2 to 1” and are located on the players’ side of the table). On either side of these or along one side of the columns are rectangular spaces marked “1st 12,” “2nd 12,” and “3rd 12” on American-style layouts. On European-style layouts these terms are “12p” (première), “12m” (milieu), and “12d” (dernière douzaine). Six more spaces are marked “red” (rouge), “black” (noir), “even” (pair), “odd” (impair), “1–18” (low, or manque), and “19–36” (high, or passe).

The roulette wheel consists of a solid wooden disk slightly convex in shape. Around its rim are metal partitions known as separators or frets, and the compartments or pockets between these are called canoes by roulette croupiers. Thirty-six of these compartments, painted alternately red and black, are numbered nonconsecutively from 1 to 36. On European-style wheels a 37th compartment, painted green, carries the sign 0, and on American wheels two green compartments on opposite sides of the wheel carry the signs 0 and 00. The wheel, its spindle perfectly balanced, spins smoothly in an almost frictionless manner.

The standard roulette table employs up to 10 sets of wheel checks (usually called chips). Each set is differently coloured; each traditionally consists of 300 chips; and there is one set for each player. The chips usually have a single basic value, although some casinos also sell chips of lesser value. The colour of the chips indicates the player, not the value of the chips. If a player wishes to buy chips of slightly higher value, the croupier places a marker indicating that value on top of the table’s stack of chips of the colour corresponding to the chips purchased. Most casinos also have high-value chips that can be wagered at any gaming table. Unlike roulette chips, these have their numbered values printed on them.