Authorities found a fully stocked bar in a low-level security prison in Mexico.  Beer, liquor, you name it.  Pool tables too!

Investigators were able to seize about 200 bottles of beer, 12 bottles of tequila and 20 bottles of vodka, not to mention guns, marijuana and heroin.

A police spokesman would not provide details on how the inmates had managed to conceal the bar from corrections officials at the prison, but did confirm that at least one prison administrator has been fired.

Maybe there was no disco ball.  Maybe that's why prison officials didn't notice.  Good to know bars are invisible.  You can have them anywhere!