I know plenty of Christians that argue like cats and dogs about whether Christenings should happen or whether they should attend if invited. Many of the people I was brought up with think Christenings are wrong and an abomination.
Christenings were born out of young children dying and a belief that they would go into Limbo should they not be christened. The bible is not explicit in saying what happens but there are plenty of scriptures which support that they are taken to be with The Lord which in my opinion makes a Christening redundant. Also
if you study the scriptures then Christenings are a bit pointless as the whole point of baptism is to die and become reborn with Jesus and the Holy Spirit in a new life. You cannot expect a child to understand this concept therefore they cannot accept Christ at an very early age.
Secondly the piss up afterwards can turn into deborchury which is against christian values as wrote by apostle Paul.
Personally, we have not had our children christened but we are active members of a church in more ways than one and believe in Jesus. If it was me I would not be attending unless the father had reconciled his marriage, believed in Jesus, repented and was been a proper father to the little child.