I would use a Martingale only on the even-money outside bets at roulette, the odd or even, high or low, red or black. These bets give the player 18 chances to win with 20 chances to lose on the American double-zero wheels and 18 chances to win with 19 chances to lose on the European Roulette (single-zero wheels). Obviously, if you can play the European wheel that is the preferred one as long as the betting ranges fit your bankroll.
If you’re playing at a table live in the casino or online with multiple players, you can imagine that it is important to keep track of whose bets are where. For this reason, casinos will exchange your money for colored chips to keep track of your bets. For example, if there are three players at a table, one player might have red chips, one might have yellow chips, and one might have purple chips. This makes it very easy for you and the dealers to know whose bet belongs to whom.
Roulette is one of the world’s favourite casino games for a reason. Deceptively simple and yet hard to master, it’s a game that reveals added layers of complexity the more you study it. In other words, if you think roulette involves little more than watching a little ball bounce its way around a wheel while randomly tossing chips at sections of the table, you don’t understand roulette. Sure, you can play it that way, but discerning players know better than that. Discerning players appreciate that there’s a right way and a wrong way to approach roulette.
On an American wheel, there are 38 spots: numbers 1-36, plus 0 and 00.  Your odds of winning a one-number bet are 37 to 1 (37 ways to lose, 1 way to win).  But if you win, the casino doesn't pay you 37 to 1, they pay you less: 35 to 1.  The difference between the true odds and what they actually pay you is 2/38, or 5.26%.  You can do this same calculation for the other bets, and it comes out the same.

Like most casino games, there are a few different variations of roulette that you will come across, depending on what part of the world you are in and what type of casino you are playing at. If you’re scared we’re about to complicate this easy-to-learn game, don’t worry; the differences in the variations of these games are extremely small but important enough to point out.
Step 2 is very easy. You need to break down your 24 chips in half, so you have two stacks of 12 chips. You then put one of the stacks of 12 on one of the dozens, and the other stack on another of the dozens. So you now have two out of the three dozen’s covered. If the ball lands in one of your dozens you will win 2-1 on your bet, so that will pay you 24 chips, plus the 12 from the winning bet will mean you now have a total of 36 chips.

We got tickets to see The Prom. We paid $70 each with fees and the upgrade to remove two additional selections and ended up getting tickets on the mezzanine. The price on the ticket indicated $61 which I'm going to assume was BR's negotiated price as it appeared the same tickets would have been about $89 if we bought them ourselves. Not sure I would use this service again as I didn't think it represented that significant of a savings given you don't have control of what you are seeing. However if you are open to seeing anything and just want some inexpensive tickets this is a good way to do it.