The large consulting companies that I'm aware of (MBB and Big4) have (or had, pre-covid of course) some variant of it. For example, Deloitte built a resort hotel near Dallas and branded it "Deloitte University" for the purpose. I know PwC did yearly training in Orlando for new consulting hires that are hired from college campuses. I believe Accenture does something similar in Chicago at the "Q Center" (though only for ~1 month).