Lee J. CALLOWAY et al., Appellants, v. CENTRAL CHARGE SERVICE et al. No. 23622.United States Court of Appeals, District of Columbia Circuit.Argued January 26, 1971. Decided February 24, 1971. Page 288 Mr. King David, Washington, D.C., for appellants. Mr. John F. Mahoney, Jr., Washington, D.C., with whom Messrs. Charles E. Pledger, Jr., and Robert M. […]