Earlier quoted context omitted.
Try doing volunteer work on the weekends for some cause you care about. One it will get you out of the house and two you will meet people who may be like-minded but are different enough from your co-workers as to be more interesting. I'd recommend also trying church. Not trying to push religion, but it's a way to get involved with a group of people who often organize social or community activities.
Serious question: do you (or anyone else) think it's immoral to go to church as an atheist just to meet people? I get along really well with church people, but I simultaneously hate talking about religion.
As shorthand advice: try to find a mission church in your area. A mission church expects newcomers from the area and should be welcoming. If on the off chance the church you attend feels unwelcoming for any reason you should try a different church. All churches are run by sinful humans and sometimes that works out better than others, sometimes not.