You'd probably have to check Twitter or the club's blogs to find a schedule.
https://www.instagram.com/hazpan/
This is the first girl's IG but I don't know if she's going to do more. She did have a show like 3 weeks ago though but it sounded like a 'final' at ArcH.
http://ayunight.weebly.com/
https://twitter.com/ayunight080412
Looking at these links, it seems super sporadic and they don't happen normally at all.