It's thetypeofhotelwhere you'reexpectedtodressfordinner.
She went to herroomtorestfor a while beforedressingfordinner.
Theconceptofdressingfordinnerwas new to her and shefounditfaintlyridiculous.
In thosedays, ofcourse,peopledressedfordinner.
Are weexpectedtodressfordinner, do youknow?
See alsodressverb(PUT ON CLOTHES)