Looking for an online way for GMs to propose face-to-face games.

I've been running a little RPG meetup group for last two years, and it's been going quite well. We've been using Discord and Meetup to schedule events, and the group is growing.

One thing I'd like to do for the group is set something up where GMs could propose games, both one-shots and campaigns, that they'd like to run. Some kind of online site where GMs could explain what they wanted to run, perhaps adding a few links about the game, and what days they'd be available to run something. Also, players could respond with their availability. Perhaps a polling system to see what games have the most interest. This would just be for face-to-face games in our local group.

Neither Discord or Meetup really work for this. Discord messages fade away too quickly and Meetup events are fixed to a particular date and time.

I was thinking of perhaps cobbling together something using Wordpress, but I thought I'd ask around first.

Has anyone done something like this before? Is there a web service already set up for something like this?