The games in the pubs are your chance to show everyone what you know about holdem. Some of the bigger holdem poker player in the world started at those pubs and today they are playing in big tournament all around the world.
The owners of those poker blackjack pubs hopes that in a few years a big tournament will take place in the US, some kind of an US championship that will make holdem poker to a national game.
If you want to know what is this game and why people loves it so much try and play it in an online casino, not every online casino offers the game, only the best ones, the professionals gives the offer to play the game without betting, just to experience. After learning the game and enjoying it you will be able to gamble on some money in the online casino and maybe earn some. Who knows, maybe you'll find out that you are the next thing in the holdem poker world. after you will play enough online you can go to play in a pub or a casino and join different contest and maybe even start to make a living out of it.