Asgardia, the newest version. Old Asgard sits dead and decaying, it was rebuilt here under the All-Mother's direction as a republic of sorts ... Lots of refugees piled in, at first, and then some of them stayed.

[ He does indeed let Steve lead a slow dance, letting him take in the awe-inspiring majesty of the realm from its magical doorstop. Loki's attention remains wholly on Steve, enjoying his delight. ]

This is the spot you'd get sucked in through a portal or shot off to your destination by Heimdall, the over-glorified doorman.