Throw a party and capture the guests in an area of the house with no escape. If you do not let them go for a long period of time, the NPCs (maid, gardener, paper girl, etc.) do not show up for a while. This is caused by your trapped visitors and may be due to the pedestrian portal being overwhelmed. Note: This is can be a hazardous glitch; if anything goes wrong, stop without saving the game.