Do you need to play casino games with a strategy?

Yes and no. You don’t have to play with a strategy when you are at the roulette table for instance, but playing with a strategy certainly helps you negate your losses. That is what strategies need to be used for: not to get a big win, but to avoid losing. If you are just playing for fun and don’t mind luck playing a major part in a game, you can just forget strategies altogether.