Typically you need cover or something to focus a fish on a spot. A stump or brush pile or even a change from one type of rock on the bottom to another -- those will hold a fish.

Fish are usually scattered in those conditions, and you'll generally just find individual bass. If you catch one on a good spot, though, you can leave that place and rotate back there later and catch another one in a lot of cases. Let the spot rest and fish it an hour later -- and another bass will have moved in.