A flood of customers; a bustling business—an idiom describing a place with many customers coming one after another.
年末のセールには千客万来を期待して準備を進めている。
We're preparing for the year-end sale in hopes of a flood of customers.
祭りの日は屋台に千客万来で賑わっていた。
On the festival day, the stalls were bustling with customers.
店の前に『千客万来』と書かれたのれんが下がっている。
A curtain with '千客万来' written on it hangs in front of the shop.