It's pretty easy to blend liquids. Like, fill the glass halfway with one, then fill it the rest of the way with the other.
The only place I've had that done was at the Rockslide (which you probably know), and the bartender did that to compensate for flaws in the beers.
, funny stuff. That place could definitely use some creative bar tending.
I am thinking about blending prior to the bar stool, so your concoction comes out of the tap.
Like, as a brewer, you actually thought about the blend, calculated ratios, carbonation levels, etc.