OP, if the question is if workplaces have parties sans spouses, yes they do. DHs company does, as does my company. I think it's kind of rude through the holidays as its a family oriented time of year. I would love to meet the partners of the folks who have to put up with me day to day
That being said, some companies go for the concept of "mandatory fun", and you have to play the game. So, I will go to my party (unless I can avoid it), put in my time and get home early. DH will go to his and I will wonder why he needs to be out to 2 in the morning. It's the holiday spirit, yeah?