>>1070018There are a couple east-german small towns whose tram networks only survived because communism and which's use is rather questionable today.
Some of them have pretty bad service levels, like this one in Brandenburg with an awkward 20/30 minute frequency.
Evening traffic is done by busses.
Sunday traffic is done by connecting the two weakest branches to one feeder line (12) for another tram, which then serves the actual town center. Until two years ago, this line 12 even only went every hour.