We play video games, mostly, or we have movie nights. Sometimes we just hang out; go to the cinema, play laser tag or go ice skating etc. The best part is all the random road trips around our small country that we take while blasting music.
It's different for my two friend groups, although we mostly just sit around, listen to music, smoke weed or drink and talk and laugh and eat.
I love it tho, spending time with my friends is my favorite thing to do, I love them very much.