What about offering it a variety of ways? One option as listed above with the mix-ins for individual taste preference. And another option would be sweetened up and mulled--could be served chilled or warmed.
Most commercial fresh pressed ciders come in at 1.030, so you could backsweeten a portion to that, grab some mulling spices and follow package directions. Use a crockpot to keep it warm, while a bottle is kept crisp and cold. A local winery carries a spiced apple wine which is 15% ACV and dessert sweet, delicious chilled or warmed. I also think a bit of cranberry concentrate would be nice, but do not forget how tart that concentrate is even when diluted per directions.