hi Fek, jasmine. welcome to here.
i had my wedding early this year and met both edwin and alina. from my info is that alina is the main contact person for wedding and edwin should be the coordinator or sales for function room. (correct me if i'm wrong, need to check his namecard to confirm).
in general, edwin do not do the liaising unless alina is not ard or doing road show.
Alina was our main contact and during the road show were we sign up, we met Edwin and nego and signed with him, during the signing, we also requested him to be our co-ordinator for our wedding. but half way thru, Alina took over when Edwin is not ard. at first we are not happy with it but after a few meeting and discussion, we find that Alina with more experiences on wedding should remains and after that we find her experiences pay off and our wedding was a total success.
As in what are the stuffs to squeeze depend on individual. have to give and take, for example, cannot be all in like free flow beer, wine, and still want free corkages.
think about what's more important that can help you save cost yet have a good and successful wedding event. for us, we give up our barrel of beer and change it to a all wine event which was good.
Renee, yes the yum seng part, nowadays getting less common too. we also use the Cheers method to skip the yum seng.
(if i not wrong, keke)