Cheney, I should have mentioned above that there are pubs that do this kind of thing on a regular basis. These come to mind immediately:

The Weekly Knob

The Knob does a prompt every week — basically curating a theme of fiction stories every 7 days.

Chalkboard

Chalkboard is the home of collaboration, it’s literally written in their header (they add “Asynchronous” because they’re very smart and fancy). There’s always something fun brewing there, with lots of poetry!

Please check those out as soon as you can.