How do I add a dance floor, stage, bar, DJ booth or buffet?

They are in the palette under furniture: dance floors in three sizes, stages, a DJ booth, a bar, a buffet table, a photo booth, a gift table and a cake table. Furniture has no seats, so guests can never be dropped on it, and it always draws underneath tables.

Resize and rotate furniture like a table. Furniture does not count as a table on the free plan.