What does it mean if a girl takes a picture with you and sends it to her friends? we just met that night?

helloyes
so we had a mixer with this girls sorority. we don't mix often so I never met her before. halfway into beer pong, she was like we should take a picture and we did some selfie pic shot or whatever it's called of just two of us. and it was some app where it sends to her friends. she said it was for fun but what's the point of this? I got drunk and forgot to get her number. is it weird to try to contact her now? I can find her emial through school directory? thanks!
What does it mean if a girl takes a picture with you and sends it to her friends? we just met that night?
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