To see or be in a grocery or convenience store in your dream suggests that you are emotionally and mentally strained. Alternatively, the dream means that you are brainstorming for some new ideas or looking at the various choices out there for you. The dream may be a pun on something that is in “store” for you. It could signify the inevitable.
If you dream that you are in a spiritual or metaphysical store, then it implies that you are lacking in some aspect of your spirituality. You need to rediscover or reconnect with your spirituality. Perhaps you are so busy tending to others that you are not listening to your own inner voice and its needs.
To notice that there are no customers in a store implies that you are alone with your ideas. You feel no one agrees with your thinking. If there are other customers in the store, then it represents your shared views.
