Am I imagining it? What do you do, dear reader, on a weekend night, that differs from the other nights?
What we don't do is anything that resembles our professional work, or involves anyone who is connected to our professional work. To do so is a guaranteed way to eventually burn out.
Ironically I can tell some people in my industry are bored on weekends, and wile away the time troll bating on Twitter. That's not my style (the one activity I'm perfectly happy saying "I'm too old for that" about), and I always think they need to find their version of a weekend island haunt, too. They are clearly in the early grips of burnout.
Relax. Unwind. If people are telling you they did "nothing" for the weekend, they may have done exactly that. Or they may have done something like a trek to the island, but don't care to mix that experience with work.
ii. Group-call with friends
iii. Outings (not frequent as it depends on my group's availability, the weather and coursework related workload)