for your 'bridal party' or a bridal party that you are a part of...??

a bridal party I am part of. Zach is a grooms man, and I'm not sure if we are supposed to bring a gift to this dinner.

is it a rehearsal dinner?

nope

just a wedding party gift if it's your own wedding

thanks it's not a rehearsal dinner. it's just a dinner for the couple and their people in the wedding (and then the significant others)

I agree...no gift required...

No, unless it's your own wedding. A solid smile is good enough.