Are these 2 the same?
Do you want to walk on Waterfront?
Do you want to take a walk on Waterfront?
I know 2 is more common, but just curious if I use 1, how that would sound?
Both are correct, depending on context.
2 Implies that you're not yet taking a walk, and suggesting walking on Waterfront as an activity.
1 Implies that you're already out walking, either for leisure or to go somewhere, and you are asking what route you want to take.
Both are correct but with 'walk on' the "walk" is a verb,
In the second one, using 'a walk', walk is a noun.
They mean the same thing accept that one is a verb and the other is a noun. But they are still the same word.
It's pretty simple though, the first one:
Would you like to walk (which is an action a.k.a. a verb) on the Waterfront?
The second one:
Would you like to take a walk (the "a" causes 'walk' to be a thing a.k.a. a noun) on the Waterfront?
Do you want to take a walk on the Waterfront?
is to walk alongside the water
Do you want to talk on the Waterfront?
only means you are conversing while next to the water, you may be sitting, you may be walking.
It is ambiguous what additional actions you both are doing.