Here is the list of casinos for which the method works
I have linked the 2 online casinos I won with.
I suggest 2 other ones for US players (also valid for non US residents).
Park Lane Casino
Use the European Roulette (Zero Spin) or the "easy roulette". The bets start at 1 Dollar which allows using my method.
Be careful not to try other lovely games as they look very cute. You are not here for that!
Netbet (ex 770)
This is where I began. I have won hundreds of dollars there playing the "european roulette" available on the site (there are various type of roulettes available).