just wonder what do you expect the host does in return?
are all the colleague got invited to the wedding banquet or wedding ceremony? if so, that's it lor. what do you expect him to do? a dinner /lunch in return?
just think, if you got invited and you will have to send in the gift, and you expect the host to give something back to you? for my i only expect him/her to say "thank you" and that's it....