They would have rehearsed and acted in plays. And believe me, that was enough, since they had to keep dozens of plays ready to perform at any time, plus learn new ones every couple of weeks or so. Can you learn one of the major parts in a Shakespeare play by heart, together with the actions you have to perform, in two weeks? The actors in the King's Men had to.Shakespeare and his contemporary Thomas Heywood (who acted at the Red Bull, not the Globe) wrote plays as well as acting in them, but they would not likely have done so at the theatre.And of course the most important actors owned part of the acting company or even part of the theatre, and there were business meetings about that, but again, they may not have been at the theatre.