Late-night Reykjavik advice? Arriving at 1 AM in mid-Feb – what’s open/doable until morning?

Hello There people :P

I’m landing at KEF mid-February at the sparkling hour of 1:00 AM 🥱 and need your wisdom:

1. Go straight to my hotel and pass out (boring but practical?), or
2. Embrace the adventure and find something to do until sunrise.

• Are there any 24-hour cafes, late-night pools, or cozy spots to kill time?
• Is Reykjavik’s downtown area safe to wander at night for a solo traveler?
• Any hidden gems (or even just a decent gas station snack spot) that’s open super late?

Thats it for now aaaand if you see a jet-lagged zombie clutching coffee and slipping on ice downtown, say hi!

Takk fyrir! (That’s all the Icelandic I [my ai helper] have mastered.)

Edit: Im arriving on a Saturday