I live in Florida, and just about anything outside (outdoor chairs, tables, grills, under cars, in sheds, etc.) will get brown widow spiders. Some people I know have never heard of brown widows (only black), but they're just like black widows except they're brown (gasp!), each of their legs alternate between brown and black all the way up, and they look a lot creepier in general.
Anytime you sit at a chair or picnic table, gotta look under it. There will usually be a few brown widows living there.
here's a picture i found -
edit - Also, even though a brown widow's venom is twice as powerful as the black widow, it doesn't inject as much during a bite as the black widow does.