I know the question was for elmomom, but I'd like to offer a theory.
I think it's plausible that LS would've have attempted the walk to JW's. The night started to out to be fun, but it took a turn for the worse when the fight broke out at Smallwood. Any young woman would've been shaken by that. CR's in bad shape, and she has to help him home. She's not comfortable there, so she decides to go back to JR's. She's lost her phone, shoes, and keys, and she needs to regroup, talk to someone about what happened. Their grandparents were neighbors for 20 years, and even if he was not a close friend, I think he offered a sense of familiarity and safety. But it doesn't turn out that way. Maybe he's loaded, not being helpful. He might've even tried to come on to her. For whatever reason, she doesn't want to be there. She feels sick, tired, and just wants to be home, somewhere safe. DR doesn't answer, so she can't get in her apartment. Maybe she can make it to JW's. After all, she really does love him, and he's the only person who can comfort her now.