What building at Pop century is near the buses?

I would say the 60's building, but it is also the noisiest. 50's buildingd are also close and are not far away.

The 60's are the closest to the main building and transportation... buses or the skyliner. Most of the rooms are preferred pool view. If you want to be in that area that's what you need to book. Yeah, I forgot to say that part about it being the noisiest area cause of the main pool. But the sound of happy families enjoying Disney like we do doesn't bother us. It's also the most expensive area so keep that in mind while you're budgeting for your trip.