snooker

Opening a snooker shop

Q:

1. If I open a snooker shop, will that money be halal or haram as I know in Islam betting is haram but in this case we are not telling the players who will come to my shop to play snooker that you have to bet but more then 90% of the boys that play bet, or both of them agree to pay money. So is it still haram or halal?

2. If I wrote on a wall that betting is not allowed here then will it be enough to make snooker shop money halal?