I just wrote a long-ass post which just got deleted, so I'm gonna keep it short and sweet this time around:
7-11 events are held pretty often such as the MP Magic Power one I went to, especially because it's such a big venue in taiwan, especially the one I went to in Gongguan. So do keep an eye out for these kinds of activities. But because of the place where these activities are situated, it could get crowded, and also you might want to anticipate a less music filled event. Basically they usually just set up the tents and the basic amp equipment, and don't really have the capacity to hold a full-staged performance of any kind. So needless to say, I wasn't able to see them perform at all, and was instead waiting for about three hours to see them and get their autographs (which I had to buy three bottles of coke to get).
I'd understand if you were a big fan of someone, but just take this into account before participating in an even of this kind!