You can place a variety of 'inside' bets and 'outside' bets until the dealer announces "No more bets."
In roulette, the payout for each type of bet is based on its probability.
Look below for roulette bets.
Straight Up - a single number bet placed on the middle of a number.
Split: a bet on two numbers placed on the line between these numbers.
Street: a bet on three numbers placed on the edge of the line of a number at the end of the line.
Corner: a bet on four numbers in a square layout placed at the horizontal and vertical intersection of the lines between the four numbers.
Six Line: a bet on two streets placed in between where two street bets would be placed.
Trio: a bet on three number including 0.
1 to 18: a bet on one of the first low eighteen numbers coming up.
19 to 36: a bet on one of the last high eighteen numbers coming up.
Red or Black: a bet on which color the roulette wheel will show.
Even or Odd: a bet on an even or odd number.
Dozen Bets: a bet on the first twelve numbers, second twelve, or last twelve numbers.
Column Bets: a bet on 12 numbers on one of the three vertical lines such as 1 to 34.