I think it's
I can dance and swirl in romantic ballrooms
Champagne is common in those glamourous events
But I'm just as good a companion in the gloom.
...but anyone can drink it perfectly in the dark
Dizzying, flying far above the ground,
When one opens a champagne, it will often explode
But I'll always land, safe and sound.
...but of course, gravity will bring it back
My best friend can be cheap and overdone
I think this refers to the carbon dioxide inside. It is a cheap chemical, and one can easily put too much into a beverage
But without him, I'm rarely fun.
but they can easily put too few, too, and that'll take the sparkle off the drink
Time doesn't matter to me. It does for my cousins.
Aging is important for wine, but not as much for champagne
I can look (a bit) like one of them, but actually, he's Russian.
I guess there's some specific Russian wine type that looks like champagne?
Though my brothers and I were born of the same parents in the same year,
This refers to the source grapevine
Our lives will end with a fist around our necks, our heads ripped off in cheer.
Opening the bottle, again, you grab it by its neck and pull the "head" off
Finally, the title
We use a corkscrew to stab the...head off