WAY TO GO, Paul !!!
Although I really don't play weddings anymore, it is essential that the special requests - first dance/bride with father/groom with mom etc. etc. - be spelled out well in advance ...
'Back in the day' with our band in NY we were playing a wedding in one room and a younger 'rock n roll' band was playing one in the room downstairs ... while on a break a frantic maitre d' came over and asked if we could go downstairs and play for the bride and her father because the RnR band didn't know "Daddy's Little Girl" ...
We played for them and the groom and mom, and later went down and did the cake cutting ceremony as well ...
We did get a thank you from the band at least ...