This dream may reflect feelings of being left out or neglected in your waking life. The presence of your deceased uncle, who was handicapped, may symbolize a sense of vulnerability or helplessness. Your niece and cousin, who are younger and possibly more carefree, represent a desire for fun and enjoyment. The fact that you were able to enter the nightclub but then left alone and unable to re-enter may suggest feelings of exclusion or being left behind. Your anger towards your niece for not caring about you could indicate a need for attention and validation from loved ones. This dream may be a reflection of your insecurities and a reminder to communicate your needs and feelings to those around you. It could also be a sign to take a closer look at your relationships and make sure you are not neglecting your own needs in favor of others.