3rd contitional bafflement

[BenDover23]

If I had gone there, I would have drunk all night
If I had gone there, I would have been drinking all night

Am I so wrong for the second sentence sounds to me more correct?

Found it here

[Beeesneees]

Both are perfectly acceptable.
The difference is so subtle that most native English speakers don't even think about it, so the phrases are interchangeable.
The difference to me:
the second (the one more natural to you) emphasises the action of drinking;
the first emphasises the time that you would be drinking for.
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Cheers m' dears!