A beach party is a fun event that usually involves music, dancing, and food. It often includes activities such as swimming, volleyball, and other beach games. The two crossword solutions for the term 'beach party' are 'MUSCLE' (6 letters) and 'LUAU' (4 letters). MUSCLE refers to the physical activity that often takes place at a beach party, while a LUAU is a traditional Hawaiian feast that is sometimes included in beach parties.