I have added plants and sales tables and to the maker space in my neighbourhood and was happy to see other sims come and water my plants and sell stuff on the tables. I have also added a couple of easels, a paintings display frame, a busker's station, vending machine and microwave, pumpkin station, woodworking table and flower arranging station. There was a maker mentor sim who was unlocking all kinds of patterns for my other playable sims to make on the fabricator. Out of all these other items added, only the busker's station, flower arranging and pumpkin craving table were not used autonomously by other sims. Other vending stalls also work fine on the lot, I had two placed on the lot at the same time. I also placed a dumpster and my sim could dive for stuff. My sim could buy and sell stuff from the sales tables and the paintings display frame. Other sims were selling paintings, flowers, fruits, herbs, candles, wax, dyes. So, my guess is that we can place everything on the lot to be used, regardless of what lot type is voted in for the ongoing week.