It's a real casino (not a staged or recorded one) which you can play plays online.
Here's how I got on testing the Martingale system in online roulette. I should add though that the game is actually run in real time in a real casino.
Although many people assert that you simply can't lose using Martingale - in reality this isn't true. This example from online roulette shows how it's quite easy to get a string of results that can easily cause trouble with this system.
The odds quoted here are based on the probability of the combined event and not the odds of the next number being red or black - which is obviously completely independent on each spin - 18/37 or 18/38 depending on which roulette wheel.
In practice as well Martingale can make a fun game like roulette rather dull!