(Seasons) Guide to Seasonal Lot Markers

I do not believe you need a specific showtime lot for a stage as any lot that has a stage will spawn a proprietors for showtime. All you need is a stage and audience area for the various stages of showtime to work. There is this possible conflict with nightlife venues that require specific star level requirements to enter as long as the stage is outside of the restricted area it should work perfectly.

So you could create a Nightlife Night Club that has a show in it plus also has a place to dance. I believe that Nightlife labeled things are treated just like private venues for the showtime lots.