"Community Game Nights."
I made a large post then shit got deleted after forum maintenance so here's the abridged version.
Community game nights should be quite regular things, and not be a substitution for proper events. Honestly the first game night just being Minecraft feels rather uninspiring.
Members should be able to create game nights on whatever they are able to, so for example I would advertise a Civ game night on a day. In my experience always trying to organize party games always takes like 30mins/1 hour which kinda puts people off.
We could have a separate forum thread to "events" where members can post without admin approval where members can set up games in advance.
For example a post could be a long the lines of "Civ 5 NQ mod game(s) 12/04/19" with further info like Download links, rules, slots, etc. It could also provide a way to keep score and possibly have some sort of leaderboard system going.
Ideas for community game nights -
Strategy games (Civ 5, HoI, AoE2, Warlight, etc)
Tabletop simulator games
Left 4 Dead
5v5's (Something like when we did monkeys v OGs)