Night jogging: Kevin has especially used this phrase a lot, and it's basically his secret way of saying he's going cruising.
Pop's Chock'lit Shoppe: This quite possibly is the only diner in Riverdale because we've never had reason to believe that any other ones exist. This is where the teens love to hang out and also where quite a bit goes down. It's now owned by Veronica Lodge instead of Hiram.
Red and Black: Similar to Blue and Gold, this was Southside High's former student-run newspaper — back when Southside High was still open. Apparently, the names of all high school newspapers in this show are just the school colours.
Red Circle: This was Archie's team of teenage vigilantes (basically just the football team) who somehow convinced themselves that they could protect the community from crime better than the police.
Sisters of Quiet Mercy: This is a really creepy group home where Alice Cooper sent Polly after discovering that she was pregnant with Jason's twins and where Cheryl was sent for gay conversion before being saved by Toni.