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

https://cashsexpertinsight.talesignal.com/posts/is-sports-betting-always-gambling-understanding-the-uk-regulatory-perspective

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