A nightclub is a place of worldly entertainment usually open at night where alcoholic drinks are served, drugs are sometimes consumed, and people dance to secular music.
Positive: Dreaming of a gathering at a nightclub with people could represent fellowship with God and His people in the night season. It could also represent that God is urging you to fellowship with people in your personal life.
Negative: In a dream, a nightclub could represent rebellion against God to satisfy the flesh. A nightclub could symbolize the nature of sin which is to be hidden from the light. It could also represent ungodly fellowship.
(Matthew 18:20; 1 Corinthians 6:9-10).