The Four of Cups is Water (connection, devotion) related to the element Earth (work, wealth, labor, basic function). It signifies being united with others in some form of work, be it work for a social cause or a business initiative.
If one is not presently working with such a team, perhaps it is a hint that one could benefit from joining a team, making a contribution to a group effort, or presenting a current solo project to others for feedback and peer review.
This card could also signify communication necessary for a system to function nominally. Whether it be at home or work, or anywhere else, it is easy to imagine what such communication might entail. Sometimes communication is necessary for one's emotional system to function nominally, especially if one has air to clear or grievances to voice with others. If the matter at hand is entirely intrapersonal, self-communication like tarot spreads and subsequent journal entries can work well.
The Abstract Four of Cups sometimes signifies sensual pleasure and worldly hedonism, such as the love of good food, bodily comfort, and simple crafts and entertainment. If such pleasure is aroused by works of art, it is enough that the works of art, and likewise songs, be pretty and pleasant. It is unconcerned with the greater meaning.
It may also signify satisfaction in the midst of the most mundane aspects of life, and not feeling wanting for something more or something deeper.
This is a card of simple pleasures.