Ceremony seating question

So we are getting married Dec 16 2017. Ceremony and reception will be in the same place. In order to avoid the 3-4 hour window that generally comes with having to flip the space we were thinking of having everyone (except immediate family) seated at their table during the ceremony.

Has anyone ever been to a wedding that did this or are you planning on doing this?

My mom FH and MOH think it's fine but I can't wrap my head around it and think it might end up having a conference like feel to it? I just really don't want to have a huge gap between because it could be really cold and there isn't a ton to do around our venue it is right down town but it would be easier to be all in one place.

Any perspective would be greatly appreciated!