The casinos have to do something to keep the players incoming too. They have to run their business and so we see this current rise in number of email bonuses, social media promotions and homemade games to bet on which can run indoors.
I am sure some friendly betting games occuring in social gatherings have reduced but it does not take long to combine a digital payment system and an IM chat with making bets with friends and this can be an alternative to gambling at local casinos.
Best works with friends who are into gambling. Anway it is still fun though the game might be uncommon but when you played it with your friends it won't ever get boring, not at all.
For casinos, their only best bet is to run it online. There's nothing they can do on having gambling except online although there will be only few users who have the materials to do it but at least they kept it running.