Looking to make friends as a couple in late 20s

My girlfriend and I just moved to Boston from Dallas. I have some friends and family in the area but my girlfriend doesn't and she's feeling pretty isolated. We want to try and make friends together. Does anyone have ideas on how to meet other people our age? We like tennis and weve done co ed kickball leagues before and will probably look for one again in the spring. Any other ideas like meetup groups or something would be seriously appreciated! We're in beacon hill

Edit: For anyone that's interested in hanging out here's some more info about us: I'm into gaming, she's into reading. We're both into travel, skiing, watching shows, and exercising. We both work in tech.