Ray Manzarek -- Legendary Rock Club Whisky a Go Go Honoring Doors Death

It's the kind of memorial rock stars dream of ... famed Sunset Strip nightclub Whisky a Go Go -- where The Doors got their start back in the 60s -- will be honoring Ray Manzarek on its marquee for the rest of the week, TMZ has learned.

A rep for the famed rock club tells us, the marquee memorial will stay up tonight through Saturday -- and every show in the meantime will be dedicated in Manzarek's honor.

The rep says the club will also be briefly "going dark" tonight at 8pm in remembrance.

As we reported, Manzarek -- one of the founding members of the iconic rock band -- passed away today following a long battle with bile duct cancer. He was 74.

The Doors were playing as the house band at the Whisky -- opening for acts like Van Morrison -- when a record exec discovered them and gave the band their first big record deal.

3:55 PM PT -- The Roxy -- another famous Sunset Strip rock club -- has beat the Whisky to the punch ... already erecting its own marquee in Manzarek's honor.