A side-effect from my stint to sea:

I used to play, some of my friends still do.
I've thought of playing again but it's just too expensive nowadays, and it drains school time.

Perfectly valid reason. But when the only thing you do all day is wake up, eat, sleep, bathe, and use the facilities... The only things you can do for fun are work out, video games, read books from the library, or extra work.