A Retro entertainment room channels nostalgic charm with bold colors and vintage flair. Choose mid-century or 70s-inspired furniture with curved lines and playful patterns. Incorporate vibrant hues like orange, teal, or avocado green alongside funky decor like lava lamps, jukeboxes, or neon signs. Add record players, shag rugs, and retro tech for a fun, throwback space perfect for lively gatherings.