I can sort of see where they are going with it, the whole son being a toddler then a baby on the dancefloor with dad but the slow music and the fact it's empty and dark doesn't quite work for me.
They would have been better keeping the upbeat track, meeting his future wife on the dancefloor and dancing with her to it, doing a nice montage of their life so far and raising the kids (upbeat track still playing throughout, 90s/00s fashion and culture throwbacks galore,) then cutting back to the present day. And THEN doing the slow track and the hug.