With a
●European roulette (single zero) the casino ALWAYS has a house edge of 2.70%
●American roulette (double zero) the casino ALWAYS has a house edge of 5.26%
I.e. regardless of what strategy a player is using the casino has an edge that will play out in the long run (the bright lights and croupiers don’t pay for themselves).
To answer the initial question “do roulette strategies work” in a single word NO!
This is Truth, actually there is no system that will change the house edge.