You should give it a serious chance. It went on hiatus for a couple of years and it has now become monthly (or biweekly, I'm not sure anymore). The first few chapters are a bit slow, but the quality goes up dramatically at some point.
Like casino gambling? Never tried em.
Not only casino gambling. In this kind of mangas they play different kind of games with different set of rules in each arc, and of course many times they bet on things far more interesting than money, like gruesome deaths or cruel fates. Games can be played with cards, dices, or just be more like mind or physical challenges. There's no limit to on what they can bet.
My all time favorite manga is of this genre: Usogui. It combines the gambling genre with the fighting genre, and somewhere around the middle the quality of the drawings went from "okay" to surpassing the drawings of OPM.
There's also:
- Kakegurui. It combines the gambling genre with lots of fanservice. Also very nice drawings.
- Gamble Fish. It's a little bit more... childish than Kakegurui and Usogui. This one feels more like the typical shonen in which everything has a happy ending and the plot is much more simple, but the bets and games are still interesting.
Not really about betting, but of very similar spirit of random games in which they risk their lives, you also have:
- Alice in Borderland (Imawa no Kuni no Arisu) and its multiple spinoffs. It's a "postapocaliptical" kind of manga in which they have to play random games to earn the right to live longer.
- There was one other I wanted to mention and it entirely slipped my mind. I'll just post this comment and come back when I've remembered it.
Just give them a try, you may be into it.