Yup. Being on a train is only a location not an activity. Like any other location it can be made more or less comfortable, I've been on a train where the heating failed; and one that was so crowded you could hardly breathe (last train home for the night so nobody was willing to miss out) but I've also been comfortably asleep in bed; eaten a decent (not award winning, but certainly reasonable even for a restaurant that wasn't hurtling though the countryside at a hundred miles per hour) meal; and watched some good movies on Netflix.