Team sports like volleyball, flag football, ultimate frisbee, dodgeball, capture the flag, etc.
A large-scale scavenger hunt.
An overnight mini-retreat in a cabin or at the beach.
Outdoor adventures like hiking, nature walks, kayaking, etc.
Serving local communities or people in need.
Camp fire hangouts with good conversation.
Sharing a meal or dessert together, whether in someone's home or out at a restaurant.
Seasonal winter activities like pumpkin patches, corn mazes, Christmas lights, gift exchanges, ugly sweater parties, etc.
Taking a day trip to a city and exploring.