convenience facilities/convenient facilities/amenities

[keannu]

Source : self practice

In the building, thousands of people work, so there are restaurants, cafes, even banks and clinics, etc in one building. It’s really convenient and time-saving to have many convenience facilities/convenient facilities/amenities in one building/in the same area.

Which do you use more in the underlined?

 

[tedmc]

You use one of them - facilites/conveniences/amenities, not in combination. You have them "under one roof", not "in the same area".

 

[Tarheel]

It's not natural. Try:

Thousands of people work in that building ....

 

[Tarheel]

Perhaps:

It's very convenient to have so many amenities in one building.