Is there a business in your town, which you are 100% sure is a front?

There is a carpet store and restaurant near my house, and in the three years I've lived here I can't recall seeing anyone buy anything or even visit either store a single time.

Once my partner and I actually walked over to check it out and the carpet store was closed and all of the windows were covered. It was like 4 in the afternoon on a Wednesday, so I can't imagine why it would be closed.

There's supposedly a lot of Russian gang activity in my area, so I'm assuming it's just a front for them but I've never really confirmed it.