When I was teaching, we either had a catered appetizer/drinks party at a local restaurant (we paid for the drinks) or someone volunteered to host the party and it was pot luck. I had the holiday party at my house once or twice and it was fun. No one minded that I didn't celebrate THE holiday. We all were looking forward to vacation!
I didn't participate in the party at my last employer, as it was at my bosses house, way up near the office. I was not about to drive back up there at rush hour, as I always ended my day at a client who lived close to home. She gave us some kind of pitiful hand made gift and some chocolate. The chocolate was nice. No stupid exchanges, though. I do remember one year, when I was new at the second school district I worked at in MA. We had a department Secret Santa and the last gift we opened up, was in front of the group. Someone gave me a box of "Condom-mints," from the condom store on Newbury St in Boston. I was mortified! I later found out it was the mild mannered intern (male)... since I was around 40, I don't think he had a crush on me, as he was young.
I used to exchange gifts with my teammates. It will be interesting to see what they do at my new clinic. The director is Jewish, and more religious than me. At least 50%, maybe 75% of the clinicians are Jewish, too. I would be happy to not have any reminders of being the "other," but I have seen some Xmas decorations in a storage area. My take is that the admin people would go through the roof if she said no celebration.
DH's company no longer has the fancy party in town, with a band, etc. Last time, it was at the JFK Museum, overlooking the waterfront. That was years ago. They now have something just for employees, in January. I didn't mind buying a dress for it, and we had to go, because of DH's position. It was fine.