Phoenix Court/Non-valid sources

Number Sixteen
Originally belonging to Liz, before she ran away with a "handsome bus driver", number sixteen was inherited by Liz's daughter, Penny, who then shared it with Andy. The pair of them ran the house as a community place, allowing anyone to come and go as they pleased. (NC: Does It Show?)

History
Multiple parties and gatherings were thrown, notably including the night Liz returned home, only to be beat up by a gang and left in the snow. On this night, Mark Kelley had sex with Andy, but the condom broke. This lead to Andy fearing he had got AIDS, but Mark tries to reassure him he did not, although he hadn't been tested.

Penny and Elsie's son had sex there multiple times, and began to build a relationship, although it failed. (NC: Could It Be Magic?)

Location
Number Sixteen was reasonably close to a play park, as a taxi stopped at the play park to drop Liz off back to Number Sixteen. (NC: Could It Be Magic?)

Elsie's house
Elsie's old husband once wrecked her garden, and Penny subsequently reordered it using her telekinesis, which put Elsie into equal distraught as the original destruction. At the revelation that he had ruined her garden, Elsie threw cans at her old husband until he couldn't move, and then brought him up to bed and wouldn't let anyone see him, until he died. She was accused of murder, but wasn't convicted. (NC: Could It Be Magic?)

Mark and Sam's flat
Mark and Sam Kelley once owned a flat together, which they brought their daughter Sally up in. (NC: Marked for Life) After Sally's kidnapping and all the life complexities that came of it, Mark stayed in the flat by himself, and Sally came to see him on weekends. (NC: Does it Show?, Could it be Magic?)