[JBlixt]

First thing you need to check is if it is legal to play tournaments like that. In a lot countries you need some kind of license to do that. In others (like our lovely sweden) you are only allowed to play for small stakes in closed groups. The bar owner, if illegal, can get legal problems... if it is legal he could get some new customers or you could split the fee with him/her.

Second; Use a laptop and download a software for hosting tournaments. There are different ones (but i do not have a link). Then you get the tournament structure up on the wall so everybody can see the limits, the number of players still in and the avarage stack.

If you want to be professional about it you should have one or several dealers.

It is not hard but it takes som preperations to do it right.