OK, after much effort, I made much progress:
The event is:

中山大学[WILL]动漫协会9周年庆晚会
which translates to:
Zhong Shan University [WILL] Ani-Manga Society 9th Anniversary Party.
If you are wondering about the WILL part, its part of their motto or something:
「We are [WILL]ers. 」
「—[WILL] you join us? 」
It took place on 15 May 2011 which is a Sunday, so I'm sure I didn't get it wrong.
Here is the Weibo account of the coser: [
weibo.com]
http://weibo.com/p/1005052115831047You would need to register have an account if you want to prod deeper into her photo album.
Contrary to popular Internet comments, I don't think she is a trap.
Her profile does list her as male but the pictures say otherwise.
However, it does lists her interest in homosexuality, which is also false since she has a boyfriend.
Here more pictures to prove my find, some are photoshopped some aren't.





There are still some loose ends but overall the matter can be said to have been resolved.
Anyway, Scremaz will receive 200k because he's been the most helpful so far.