It was and still is (under a different name) in Glendale. I have lots of good memories skating there, seeing teen actor Paul Peterson from the Donna Reed show, celebrating my birthday there with friends and doing the Hokey Pokey on skates!
Apparently, there was another Harry's Roller Rink - the first one - in San Bernardino too. Read more here: http://www.ci.san-bernardino.ca.us/about/history/harrys_roller_rink.asp
"In 1956 Harry bought and remodeled an existing building in Glendale, and it became Harry's Roller Rink #2. Bobby, who lived in the area for a few months each year, would go to the Glendale rink. He remembers skating with Rita Hayworth's daughter Princess Yasmin Aga Khan in 1963. When Harry and Bobby were at the rink, Harry closed the evening by singing, 'I'll See You In My Dreams,' which he dedicated to his son. Later in 1963, Harry sold the Glendale rink. The name was changed to Moonlight Rollerway-and it still exists. Bobby says it looks the same, and even has the original telephone number from 1956."
The Moonlight Rollerway, formerly Harry's Roller Rink #2, still looks the same as it did when it was Harry's in the 1950s and '60s, according to Bobby Dickerman