Who am I?

I am a beautiful place. I have two entrance ways. One of them has a function as an information board. The other one has a purple box where anybody can put his/her task. A nice board is placed above me. It shows the name of my master. I used to be searched by seniors. I also have four colorful windows. My master usually put the schedule on me. If you want to see me, you may look for me from outside or inside the meeting room in this popular study program. My master is very busy, if you want to see my master you have to make an appointment with my master before.Yeah, my master is a vice leader in this famous study program. So, who am I?