Give your kitchen a retro diner vibe by incorporating a built-in slushie machine. Opt for a vintage-inspired design with chrome accents and bright colors. Use retro signage, neon lights, and checkered patterns to create a nostalgic atmosphere. Display classic diner accessories like milkshake glasses, striped straws, and old-fashioned soda bottles. This kitchen decor idea will take you back in time while you sip on a refreshing slushie.