OK, it’s not the most social way to enjoy having a table tennis table in the house, but if you have a room with less space than you need, especially along the length of the table, then using a table tennis robot could make things work.
With a robot, especially the kind that you put on top of the table and shoots balls to you for practice, there’s no need for any space beyond one side of the table. Instead of all the space you would need for two people to be able to move front to back and laterally, with a robot, you can practice by yourself, or take turns with only the length needed for one player in addition to the table.
If you are seriously training, then this can be a chance to get your form and consistency together. Depending on the type of robot you get, there are a lot of different settings for a lot of different types of spin, including randomizations.
Given, part of the fun of a table tennis table is being able to play with friends and family members, but for training purposes, a table tennis robot can help someone make due with less space.