I lived in BKK 3 years before I moved to Pattaya.
I worked (as a defense contractor). Lived off Lat Phrao as well.
Been from Hua Hin to Chiang Rai over to Laos, down to Koh Chang and most places in between.
If my life depended on it, I could NOT tell a soul where exactly Khao San Road is.
Somewhere in a city of 8 million people???
I never even asked a taxi driver about it. I was a booked into the Dynasty hotel my first visit.
I was happy.
PS....If you need directions to Cupidy, I can help.