The 60s bldgs are the "preferred" bldgs - and cost $10/night more. As you walk out of the main building, Petals is off to the right, and of course, there's the pool. The 60s Bldgs are around the main pool.
The 50s & 70s bldgs are also very close to the main building. In fact, last summer we stayed in the 60s bldg, our room was on the 3rd floor, overlooking the kiddy pool. It was a great location, and it was very quiet. We never heard our neighbors, or any noise from the pool. In Dec and again last month, we stayed in the 50s bldg - for Dec we were in Tramp's bldg, and June we were in Lady's bldg. Both were excellent locations - very quiet, and a short walk to the food court/bus stop area. It has its own pool there, but it is a short walk to the main pool. We were able to see fireworks from our room in the Tramp bldg!!
We love Pop Century!!! It really is cute, and I don't think you could go wrong with any of the rooms in the 60s (preferred), or the 50s (Lady & The Tramp).
Have a great trip!!!!