What are the interesting facts in roulette games?

Roulette is a popular game used for gambling in casinos.
The name roulette is derived from a French expression meaning 'little wheel'.   The
roulette essentially consists of a wheel marked with different numbers, the wheel is
made to spin in one direction and a small ball placed within the periphery of the wheel
rotates in the opposite direction. The betting for gambling is on the basis of
predicting the position of the slot in which the ball will fall on slowing
down.

The roulette wheel is generally incorporated as a
part of a roulette table. Betting players are seated around the table. Roulette wheel
may have different number of positions marked on the wheel. American roulette has 38
segments around the circumference of the wheel, numbered from 1 to 36 plus a 0 and 00. 
Many wheels in Europe do not have 00. Alternate segments are coloured red and black. )
and 00 segments are marked green. There are small small slots on the wheel for each
number.

Players place their bets by  placing chips on a
betting layout marked in the roulette table.  Then the person dealing the roulette
wheel. often called the croupier, rotates the wheel and at the same time rotates the
white ball on the rim of the wheel in the opposite directions. The ball drops into one
of the slots as the wheel and the ball slow down.  That number and colour become the
winner for that spin.  Players can bet in many ways.  They can bet on single numbers,
groups of adjoining numbers, sets of 12 numbers, the red or black colours, odd or even
numbers, or the low or high numbers.