"Вони у цьому спортзалі?"
Переклад:Are they at the gym?
Можна. Я додав до варіантів, що приймаються.
Якщо когось цікавлять нюанси, ось знайшов таке пояснення:
I use "at the gym" when "the gym" refers to a place, like a health club.
Sorry I missed your call. I was at the gym.
I'm meeting my friend at the gym tomorrow morning.
I ran into your sister at the gym yesterday.
He's at the gym now, but I'll tell him that you called.
I use "in the gym" when "the gym" is a large room inside a building, like a school or community center.
The assembly will be in the gym at 1:00.
Due to inclement weather, recess will be held in the gym today.
Mrs. Smith's class is in the gym right now, but they'll be back in 10 minutes.
The kids are playing basketball in the gym.