Dreaming of big empty garage-like buildings can symbolize a sense of isolation or a feeling of being in a transitional space in your life. These structures may represent areas of your mind where you store unprocessed emotions or experiences. The presence of many people, particularly those with whom you have a history of drug use, may indicate unresolved feelings or memories related to that time in your life.

The act of hoping fences and trying to escape from a gang can signify a desire to break free from past influences or negative associations. This part of the dream may reflect your inner struggle to distance yourself from harmful relationships or situations that you feel are holding you back.

Overall, your dream could be urging you to confront past experiences and seek freedom from their grip. It might be a good idea to reflect on your current relationships and environments to ensure they align with your goals for a healthier and more positive future.