Blah, Silk was looking out for someone to tag along with, she needs to "recognize" someone she knows to disappear with into the alley...
@Ten-Hex: Since most people already went ahead and inside, that'll have to be Still Waters, he looks pretty shaman-like already and scoping out the place; when she
noticed him casting a spell she'll assume he's there for the same reason. (If he isn't she'll still have amused herself

)
Not going to post in IC myself (yet) because you haven't actually cast the spell yet... if you want, feel free to write it yourself, including her actions; if not, please allow some space for Silk to react to you.
Silk will wave at you and yell some greeting with a made-up name, then run across the street to greet you with a kiss (cheek!) and let you guide her in the alley, to make out or whatever else in the cover of the shadows (and the car parked there). If you don't play along naturally, she'll use her voice-throwing-trick to tell you what she expects you to do, if you don't work along with that either... well, she'll have to improvise something else

It not really required, but just stepping out of the queue without reason seems socially awkward, she's got an image to protect.