Except that when she leaves the bathroom, she's not in the hallway. She's in what appears to be a large, brightly lit bar. None of these things apply to her hallway. She feels rather out of place; t-shirt, pajama pants and stuffed unicorn are not exactly magic bar attire. (She thinks.)
As far as Jenny knows, there's only one person in her immediate vicinity who associates with magic. This doesn't seem like Soph's style, but it also doesn't seem particularly threatening. From Soph's explanations, evil magic is pretty up front about being evil. "I replaced your hallway with a restaurant" does not scream evil to her, it's just weird.
She ventures inside a few steps. "Soph? Soooooph, is this you?"
"The glitter or the knife? The glitter was silly, yes, but that was sorta the point! Her sister really likes the knife though, it's easy to hide and it works on vampires." She grimaces. "And yeeeeah, vampires are apparently a thing, that was part of Soph's welcome to magic speech dealie."
Jenny is not nerdy enough to make a joke about Earth 2. Instead, she glances back at the original napkin before settling herself onto a bar stool. The stuffed unicorn may have its own place on the stool next to hers. (Fancy was hers before he was Anne's, she is allowed to be possessive.) "So, how do beverages work? I don't carry money in my pajamas or anything... And I can't, like, pay you in magic or anything. I am boringly magic-free."
She picks up Mr. Fancy from his spot next to her and holds him in front of her as she turns to Lexi. "Hello! I am Mr. Fancy! Thank you for saying I am cute!" Her low voice isn't at all believable, but it is also, for duckling reasons, definitely aimed at small children.
She glances over to see what the napkin says, and splutters slightly. "Er, anything? Geez, I don't know. Something pink?"
"Probably both," she says cheerfully. "What else is different? Are there more unicorns where you're from?" (!!!!!!)
"You probably don't have them like ponies have them if you don't know what I mean. Ponies are all especially extra good at a thing, and when we figure out what the thing is, we get a cutie mark - mine's the gold star - that represents it. I'm good at predicting the future. Usually. I can't seem to make the spell work here."
"Yeah. Gosh, it wouldn't be much use otherwise, would it? I see what'll happen if everything goes along pretty normally. People who behave in weird ways can throw me off, like my friend Joy does that sometimes, and if you don't like what I see you have a chance to do something about it."
Jenny is not an expert in temporal theory, and is happy to take her word for it. "I guess that makes sense!" She looks around, but sees no seats that look well suited for a unicorn. "Er, not sure how you'd sit really, but do you want to join us? I mean, I'm sorry if I'm being weird or annoying, it's just so cool. Unicorns are like my favoritest thing and I never thought I'd meet one. And now you are here!"