"Guests do ask," said Carly Yates, a Warner Bros spokeswoman. "They say, 'Where's the cafe?' And it's not a real cafe. It's a facade."
For Warner Bros, which has rented out its vast lot for other films, such as Spider-Man, it makes sense to call out La La Land.
The film swept the Golden Globe Awards, is nominated for a record 14 Academy Awards and has taken in more than US$300 million ($418m) in worldwide ticket sales.
With help from Lions Gate, the studio reconstructed the fictional coffee shop, which will be a part of the tour until March 6.
Seeing the key locations requires some driving and patience in Los Angeles traffic.
It can take an hour and half to travel the 40 or so kilometres from Warner Bros to the Lighthouse Cafe, a Hermosa Beach jazz bar frequented by Ryan Gosling's character Sebastian.
That's near the city's pier, where Gosling sings the film's feature song, City of Stars.
Lighthouse general manager Steven Grehl said his bar sales have spiked more than 13 percent in the past three months.
He petitioned to keep the sign added by the movie's production designers as a permanent part of the cafe after he noticed young people lining up to take pictures in front of it, and plans to add more La La Land artwork and photos in the cafe.
"I want them inside," Grehl said. "We're going to ride this wave now. Regardless of what happens in the award season, we don't think it will fade."
Of course, to benefit from the attention, a business has to be open. The Rialto Theatre in South Pasadena, where Mia and Sebastian watch Rebel Without a Cause, has been closed for years except for a few private events, according to Escott Norton, founding president of a non-profit group pushing for its restoration.
"People stop to take pictures almost every day, and all because of La La Land, "he said.
"I've spoken to people from all over California, as well as New York, Texas and as far as Japan."
Los Angeles recently awarded the film a "Made in Hollywood Honor" for location manager Robert Foulkes and others' efforts to shoot almost entirely in the city.
Other iconic sites included downtown's Grand Central Market and a major freeway interchange south of downtown where the opening dance number is shot.
The fact that this movie was filmed locally "made a lot of people very happy," said Kim MacMullan, president of the Hermosa Beach Chamber of Commerce.