We'd say you should designate these as the "stay-at home shirts" but you should actually do yourself a favor and just get rid of them. The era of gaudy, billowy untucked shirts with contrast fabric under the cuffs and collar is long over. Technically, any well-fitting shirt can be a "going out shirt." What you wear on the daily should be as dope as what you throw on when you hit the club or the bar anyway.
Going Out Shirts