No War Tomorrow by Wallace West

Nirvana had once been the main pleasure city of Wildoatia while Venusport had been its administrative center. Since the latter had been taken over by United Stars, Nirvana had also become the Big Shot capital. But it still retained its synthetic medieval grandeur. On a mountain top which pierced the planet's lower cloud layers, it rose, tier on tier of marble castles, twisting streets and crenelated walls, until it disappeared in the distance, like a dream of old Spain.

They were welcomed like heroes into Valhalla when they reached the frowning wall, with its moat and torchlit portcullis. Trumpets sang from a dozen towers; the drawbridge came down with a roar. Out marched a guard of honor in shining armor, preceded by a bevy of houris in diaphanous robes, or better. The latter strewed orchids along the pathway before throwing themselves into the arms of the newcomers. There were even handsome youths to greet the women in the party.