Treatee

rare. [f. as prec. + -EE.] One who is treated or entertained: see TREAT v. 9.

1841.  J. T. Hewlett, Parish Clerk, III. 71. The interpretation of which was left to the treatees.

1884.  Stockton, in Century Mag., XXVIII. 588. Each took a cigar with that careless yet deferential manner which always distinguishes the treatee from the treator.