Everything around a center courtyard had not been planned, it just worked out that way. The hospital/recreation area are in ruins which were discovered when the cave system opened up while digging out the guest rooms on the right side of the courtyard. The vast majority of my pawns are androids, which is why there are so few beds compared to the population.
Thought I lost the colony when my game crashed last night and reloading brought up everything as unexplored. Not sure what I did to fix it and get the save back.