Marilyn Monroe, as a virtually unknown 22 year-old, lived at the Hollywood Studio Club, 1215 North Lodi Place, a hostel for young actresses, between 1946-47, sharing room 307 with Clarice Evans. She returned for a second stay in 1948.
Vintage interview with roommate Clarice Evans at The Pittsburgh Press
Mini-documentary on the Studio Club, posted by The Actors’ Workshop on Youtube
Thanks to Megan at Everlasting Star – more information here