There is a way to make working indoor attractions like haunted house, 3D cinema, etc. Put a flat ride one like the scrambler or whip that doesn’t go upside down or in the air inside of your building. The building will hide the flat ride and you can have a queue line go up to the building and in where it will connect with the ride entrance. Exit path can leave ride and go outside of building. I didn’t try this, but I thought about putting the flat ride underground to hide it or building walls inside around the flat ride to hide it further. This way, you will have the appearance of guests entering the building, and then leaving the building.