Isn't it possible now to have social events on Generic lots?

There's a glitch related to adding lots from the gallery. Here's an explanation from Brittpinkiesims:

"Sometimes, when downloading a lot from the gallery or the library, the game won’t automatically register it as a lot that can be visited for an event and the “Plan a Social Event” page will show up blank. After downloading..., set the lot type to something random..., exit build mode, enter build mode again then set the lot type back to Generic. It will then show up when you go to plan your event."