пойдём на кофе vs пойдём В кофе

How does the former different from the latter ?

Let's go for coffee.

Let's go into the coffee. Your Russian one is equally nonsensical. Unless you meant кафе in which case Пойдем в кафе Let's go [in]to the cafe seems ok to me.

Does this make sense?
Пойдём в кафе на кофе.
Let's go to the cafe for coffee.

It's better to say "Пойдем в кафе, попьем кофе."
However, your variant is acceptable.

Would this sound better or at least normal?
Давайте пойдём выпить кофе

Quote:

---

Originally Posted by DDT

Would this sound better or at least normal?
Давайте пойдём выпить кофе

---

There is a differense, but I can't specify it... Something like this, may be:

Давайте пойдем попьем (the future t.) кофе. - sounds better
Мне нужно выпить (indef.). (without limit, and get drunk)

Давайте пойдем погуляем по парку.
Давайте пойдем погулять. (in general, wherever)

Давайте пойдем поспим полчаса.
Давайте пойдем спать. (altogether)

Maybe it's only me but "давайте пойдём" sounds a little unnatural. I think "пойдёмте" is way better.