Like Riviera, it’s sports betting for me too. Almost exclusively football (that’s soccer to you guys).
I bet £100 per bet and I’m up just over £1,000 so far this season. I don’t really see the attraction of other forms of gambling, though I’m happy to play bridge at £1 per point if you’re prepared to risk it 
Now, where’s the online bridge sites or is it too easy to cheat and therefore not viable ?