There are three of those coffee shops at that train station.
There are three Starbucks at that station.
ーThere were three of those coffee shops at that train station.
「その駅には(同じ)カフェが3つあった。」
three of those coffee shops ということで同じカフェだというニュアンスがすでに含まれています。
ーThere were three Starbucks at that station.
「その駅にはスターバックスが3つあった。」
このようにカフェの名前を入れて言うこともできますね。
例:
I was supposed to meet a friend at the Starbucks at 〇〇 Station, but there were three of them and I didn't know which one he was at.
「友達に〇〇駅のスターバックスで会う予定だったんだけど、(スターバックスが)3つあって、彼がどのスタバにいるかわからなかった。」
ご参考まで!