Ok, so here's the deal. Devioween is going to happen. That's what we know for sure.
As for the costumes, it's completely voluntary, you can come in a costume but you also don't have to. I myself had to put mine back on the rack due to personal reasons. I'll explain myself on the place if there are any questions.
It's very likely this devmeet will take place in Bastion Pub (yes, once again. if you have a better idea, add it up in the comments, please. thanks. ) at around 18:00 p.m. However, keep your eyes on a lookout because this may be a subject to change.