Precious Ruby’s 13x19" Print. Part of Homecoming Collection. Ruby’s Diner opened in 1982 at the end of the Oceanside, CA Municipal Pier, and closed in May of 2021. on April 25th, 2024 the Pier caught fire and the building that had been Ruby’s was ultimately destroyed. The Oceanside Pier has been rebuilt six times since it first opened in 1888.