Okay, I found this map while it was slow at work. Title "24 Hour Fitness" suggested a gym, probably giant size, and that's what it is. There 2 rows of lockers, an office, shower, steam room, and a few other things.

It's multi-level combat. On the ground, in the lockers, on top of the lockers, on top of the office, in the ceiling.

There's a few hidden areas and paths.

Music is embedded into the map, it's just the 1 file.

Seemed ideal to me to anyone that likes redeemer battles or just giant size maps.

It's only the 1 file, so other than opening it in UnrealEd I've got no idea who made it.

It's got pretty decent bot-pathing, though they mostly stick to the ground level.
File attached.