I went to see a movie on Christmas day in the U.S. and I was surprised to see that the theater was nearly empty.
Could you tell me if there are any lessons with free seats left?
Are there still many open seats left? If possible, I’d prefer to sit in the front.
A sky seat is a seat full of sky (aka nothing!). This is an empty seat or open seat.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.