I participated once due to high rewards but it's just for testing my beginners luck. I really don't preferred a gambling game on which Im not comfortable and doesn't have a knowledge on it.
Horse racing gambling game is legal here but only for those who are regulated. Any kinds of unregulated gambling here is illegal. We have some sort of gambling bookies around our streets and it attracts people (generally, mostly age of late 30's above) because of high reward on a small bet although as usual, it must be on high odds. And honestly, houses around that bookies take that opportunity to do business by establishing a drinking bar with live horse game to watch since the main bookie was full of people and you can't watch the race properly.
Just a dissapointment that at the end of the day, lots of paper bets scattered all around the place and it will just be sweep by street sweeper the next day in the morning.