あの部屋に

in that room

→ あの
phrase Rare #24,494
in that room Depending on the verb, に can also indicate a destination, meaning “to that room.”
JA: あの部屋に猫がいます。
EN: There’s a cat in that room.

どうかあの部屋にいさせてください

Please let me stay in that room.

— 魔女の宅急便 (1989)

あの部屋には近寄るんじゃないぞ。

Don't go near that room.

あの部屋には入るなよ。

Don't go into that room.

あの部屋に誰かいたんですか?

Was someone in that room?

なぜあの部屋に?

Why were you in that room?

— オールド・ボーイ (2003)

私は彼らがあの部屋に泊まるのに、お金を請求しすぎた。

I overcharged them for staying in that room.

あの部屋に誰かいた

There was someone in that room.

— REC / レック (2007)

あの部屋には客が大勢いる。

There are a lot of guests in that room.