oooh boy! i mean i can definitely try to think of some more! i think it should stated that most of my experience planning events comes from admining town rps so most of these ideas will probably be skewed that way but please feel free to try to make it fit for any group! 

• THE ANTI-HOLIDAY EVENT: look, listen, the holidays are exhausting for everyone and there are a lot of people who pretty much despise the holiday season period. why not make an event for the haters? i’m thinking maybe a bar crawl! just imagine the chaosity that could ensue with a bunch of inebriated muses making their way from bar to bar singing whatever the opposite of christmas music is! or a karaoke competition at a popular spot downtown where the only rules are no holiday music or sad songs or it’s immediate disqualification! these could happen shortly before the holidays in character so that muses who are planning to celebrate the holidays with family can have a place to blow some steam and be surrounded by likeminded people before the upcoming festivities!
• SUPPORT YOUR LOCAL STARVING ARTISTS PLS: an art festival!!!! think about it a concert series with local musicians, a pop-up drive in movie marathon / outdoor movie marathon in the park, a craft fair! there are so many ways to center an event around something artistic that muses can enjoy that doesn’t necessarily have to be holiday related! this is also an easy way to incorporate muses who are artistic into plots too!!! people can have their muses doing something at the festival like either performing or selling their art or providing food and drinks! bonus points if this art festival is happening for a good cause, like maybe the local movie theatre is about to go under and this is the town’s last ditch effort to raise enough movie to save it!
• A PLOT DROP OF SOME SORT: something admins can do instead of a standard christmas event is to do some sort of plot drop that characters ( and muns ) can use to push along plotlines or maybe shake things up and start new ones for their muses! i think one of the standard ones people tend to do is like a storm or some sort of natural disaster but it’s 2020 and we’re all kinda tired of irl natural disasters so maybe more out of the blue and leaning toward ridiculous but still have some stakes for people to decide how much or how little it’ll effect their muse??? like what if a wild animal gets loose in the town? or there is a group of high school trouble makers going around and breaking into homes a la bling ring style? or maybe it’s a series of mysterious graffiti showing up everywhere? you can have fun with it! 
• HANUKKAH EVENT: i’ve already suggested this in my last one but i’ll suggest it again. do whatever you were going to do for a christmas event but center it around hanukkah instead! were you gonna have a christmas fundraiser ( ball / party / gala )? make it a hanukkah one instead! were you gonna do a christmas tree lighting? make it a menorah lighting instead! did you know that hanukkah is often known as the festival of lights? you could literally have an event centered around that concept alone! friendly reminder that hanukkah starts on the 10th this year and ends on the 18th! 
• ALTERNATE UNIVERSE BABYYYYY: you know what i miss from 2012 rps??? random af unhinged au events that literally made no sense but were still so much fun! it’s the holidays and usually most groups tend to go on hiatus or like an extended break where activity doesn’t count around this time so people can be with their families but this year i think a lot more of us will be around so why not do something fun that only lasts the duration of said hiatus or little break ( or just a regular event worth of time if your group doesn’t do that!) i’m think TEN YEARS INTO THE FUTURE AU ( typically people pick older fcs for their current muses and rp what their lives in the future is looking like ), or a good ole fashion GENDER SWAP AU ( typically people pick fcs of a different or opposite gender for their muse ), or if you’re a normal non-spn group a SUPERNATURAL AU ( characters get to be mythical creatures ) or if you’re a spn a ( OPPOSITE AU where like human charries get to be supernatural and all the supernatural characters are human! ). listen ANY TYPE OF AU REALLY GOES THESE ARE JUST THE POPULAR ONES I REMEMBER FROM BACK IN THE DAY!
• ASK YOUR MEMBERS: you can’t go wrong by asking what your members would like to see instead of the standard christmas event! i’ve never adminned a group where members don’t have opinions and ideas. i promise if you just asked them they would probably be able to give you far more creative ideas than little ole me and that are probably better suited for your groups since they are actually there and know what would work and what wouldn’t