This is a good story about Icehouses in Texas. It is mostly in San Antonio, but Houston is similar.
One of the more famous Icehouses in town is just down the street from us - The Alabama Icehouse.
NPR : Texas Icehouses Melt Away
Interestingly enough, it is illegal to advertise "Cold Beer" in Texas. That is why you always see the signs "Ice Beer Soda" on the stores.