Whenever I want to some some content related to gambling or casinos, I usually lurk the subreddit of gambling, there are much people there and they usually stay very active and share their experienced with the most reputable casinos of this market.
Though, I am aware reddit is not a forum, but it is a community which can be used to talk and get informed about pretty much anything which comes to mind.

People have long moved to Twitter/reddit from forums, it is not what it used to be from the early 2000s, when places like this one were much more relevant.