The neighborhood in this episode is just a few blocks away from Nielsen's Book Store in Episode 33 - "Dead Patrolman." In that episode - at 10:00, just after "Larry" completes his call to Nielsen, - the two con men stand at the southwest corner of Melrose Ave. and Poinsettia Place while conferring. In this episode - at 6;32 when the narrator says, "Parks and playgrounds, etc." - Mathews walks on the corner of Poinsettia Pl and Romaine St. The park is the Poinsettia Recreation Center. This is just a few blocks north of that location on Melrose and Poinsettia in episode 33.
Go to Google maps and enter "993 North Poinsettia Place, Los Angeles, CA" and go to the Street View to see this.
It took a few minutes of "driving around" the neighborhood via Google Street View for me to find two other locations. At 6:21, Mathews is shown outside a house with a prominent chimney, This house is at 857 N. Martel Ave. on the southwest corner of Martel and Willoughby Ave., to the west of the Poinsettia Rec. Center. Eddie Streiter's house -shown at 6;37 - is at 901 N. Martel on the northwest corner of the same intersection just across Willoughby from the other house.
Enter "902 North Martel Los Angeles CA" in Google Maps and you can see both houses. The camera was set up on the northeast corner for both shots of these houses.