I'm a fairly new player to Subeta (less than a week!), and I'm slowly working towards that 100 posts needed to enter the blue building. :-D

Welcome. I didn't know 100 posts were needed to enter the blue building. I will have to start posting more.

Yup! you can see the requirements here. I'm about 100 achievements, 80 posts, and half a treasure map short of getting in. :-D

It turns out I do have enough posts. I post a lot for the Halloween and Christmas activities. What I need to work on is collecting cards and that treasure map. Anyway, I wish you luck in getting into the blue building and hope you have fun on Subeta.