Casino games like roulette let you play against the house with set rules and...

https://eduardosexpertnews.opalvector.com/posts/what-s-the-difference-between-gaming-and-betting-in-uk-law

Casino games like roulette let you play against the house with set rules and odds. Gambling is a broader term covering all betting activities involving money at risk. Betting usually means placing a stake on an uncertain event, such as football wagers