Disc golf

Get a starter set for ~$25 or a single disc for $10-20 for each player.

There are a bunch of fantastic courses in CT and about 90% are in public parks so they are free to play. Just show up and start throwing. It is incredibly simple to understand the basic rules and fundamentals of the game and it isn't "stuffy" like regular golf. There is a great local community and nearly infinite online resources if you want to learn more. A round of 18 holes should take 1 - 2 hours for a pair of beginners and you'll end up with around 5 - 8k steps at most courses. If you don't want to play all 18 holes you can do as many as you want then leave.

For someone in the central part of the state I would recommend trying Panthorn Park in Southington first, particularly the short layout. Most courses are open year-round and if you enjoy the game you can find courses all over the country/world. Conveniently, nearly every course in the state has a local brewery within 5-10 minutes so you can reward yourselves with a drink afterwards.