No it is not mandatory. Some parents (could be the bride to be's parents) may have the groom, bride, their parents and the wedding party out for dinner in the evening a few days before the wedding, but this is not mandatory either.
what does the groom parents pay for at a traditional wedding
Anything you or the grooms parents feel comfortable with maybe a honeymoon present. If they step in too much just ask them who's wedding is this
Away from each other.
Remember this wedding is not about the parents, it is about their child and they are there to bear witness, show support, and ensure neither the groom nor the bride decide they have cold feet and vanish.
Certainly, if they are willing and able to entertain the entire wedding party .Certainly , if they are willing and able to entertain the entire wedding party .
For the lovely wedding, if the Bride's parents pay for it, and for the gift of their daughter and themselves as a welcome addition to their family. Your children's wedding day is a time to be on your most welcoming behavior , even if you have the slightest reservations.
A chicken suit
The wedding to do list for groom's parents include hosting the engagement party. They provide the couple with a list of guests and host the rehearsal dinner on the evening before the wedding. They may also contribute to some of the wedding expenses.
All families are different. Sometimes, but groom's parents pay for other things.
If neither of the groom's parents remarried, this shouldn't be a problem, but if one or both remarried, ask your rabbi about this.
The groom generally pays for the honeymoon.
The grooms parents pay for the rehersal dinner and all expenses associated with it.