When the bikers are chasing the main characters after pouring beer on their bikes, everything looks very blue. Though that can be achieved with light filters and gels, this particular scene was shot outdoors with indoor film, which is not color-balanced for sunlight, causing everything to look blue.
The Haunted House nightclub in the movie was a real nightclub in the 1960's and frequented by many celebrities at the time. As of 2025 it is a strip club at the corner of Hollywood and Vine.