How do I ride on the Vinewood tourbuses?
One spawns on Vinewood Boulevard. It appears on the left hand side usually, and is blue. When you pass it, music and ambient noise will go quieter and you will probably hear a woman's voice offering tickets or trying to attract punters on the tour. It is west of the Oriental theater when the Republican Space Rangers appear.
When you find it, look on the pavement for a woman near the bus and an on-screen prompt should tell you how to pay for the tour.