で落ち合おう

let's meet up at

→ で
phrase Rare #36,660
let's meet up at Used to suggest meeting at a specific place. The location comes before で, and 落ち合おう means “let's meet up.”
JA: 駅前で落ち合おう。
EN: Let's meet up in front of the station.

ナバホ崖で落ち合おう

Let's meet at Navajo Cliff.

— ウエスタン (1968)

例の場所で落ち合おう

Let's meet at the usual place.

そこで落ち合おう

Let's meet up there.

車で出かけたからここで落ち合おうって

They said, “Since I drove here, let’s meet up here.”

— アバウト・タイム ~愛おしい時間について~ (2013)