If you want to combine activity and partying, you can try something unconventional. For example, there is the Berlin Beer Bike, which is a large bicycle that you can ride with the whole group and not get bored. It's not just a ride, but a really fun ride with music, drinks and a great atmosphere. You can get your friends together, go for a ride and not just sit in one place, but move around and socialize. If you are interested in this option, here is more info https://berlinbeerbike.eu/

The main thing is a good company, and you can come up with any format. You can organize something active, like a joint trip or some unusual entertainment. The main thing is to make it fun and memorable.