One that comes to mind is M&L fabrics in Anaheim, California. Back many years when and M&L were alive (I can't remember their names but they were a husband/wife team) they had a huge store with piles and piles of fabric stacked so high that several times when I went I was afraid to walk down the aisles for fear of the stacks tipping over. Since M&L passed away their daughters took the store over and I believe it was around this same time that they were cited by the fire department as being a fire danger. The store closed for a short time and reopened much more organized. They still have stacks of fabric but they are on tables and are much more manageable. I try and make a trip their about once a quarter to see what's new. Some of their very old fabrics are at rock bottom prices, like $2.99/yard! Here's a link to their website
http://mandlfabricsdiscountstore.com/