We are all good friends; why stand on ceremony?

都是自己人，何必客气呢？

As we are old friends, it is totally unnecessary to stand on ceremony.

都是老朋友，大可不必如此客气。

Please don't stand on ceremony.

不要太客套了。

But this was no time to stand on ceremony.

但是现在不是讲客气的时候。

The hostess asked us not to stand on ceremony.

女主人请我们不要客气。