Could be in any context. I do it a little on UFC fights but that’s a relatively low amount and I can afford I to lose any time I do. It seems like it’s becoming a really wide spread problem though, at least in the US. At the same time I don’t see why it should be illegal. Granted I also don’t think any drug should be illegal.
When I was a kid in the eighties, slot machines were abundant and there was no age limit, at least not enforced. So we kids tried it, and basically I got lucky because I never won anything and have never tried them since.