Looking on the internet deeply has found these results:

The number of customers at that shop were higher the other night! * is the most popular phrase on the web.

The number of customers at that shop is higher the other night! * 11 results on the web	The number of customers at that shop were higher the other night! * 13 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
They sell good foods at that shop. In line with recent trends, the number of customer payments again increased in all systems. We've doubled the number of customer service representatives in our call center. The number of customers maintaining a business relationship with the Eurosystem remained stable over 2009. I bought a cat at that shop. I had my camera repaired at that shop. The number of loans and advances to customers at the end of the accounting year is included here. The number of loans and advances to customers at the end of the accounting year is included here.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

The number of customers at that shop is higher the other night! *

11 results on the web

The number of customers at that shop were higher the other night! *

13 results on the web

More popular!

They sell good foods at that shop.
In line with recent trends, the number of customer payments again increased in all systems.
We've doubled the number of customer service representatives in our call center.
The number of customers maintaining a business relationship with the Eurosystem remained stable over 2009.
I bought a cat at that shop.
I had my camera repaired at that shop.
The number of loans and advances to customers at the end of the accounting year is included here.
The number of loans and advances to customers at the end of the accounting year is included here.

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.