engagement proposals:  creative suggestions, performers, choreography, etc.

venue location(s):  ceremony, reception, destination, etc.

personal trainer

dance choreography (hip hop, ballroom, salsa, etc.):  for the engaged couples "first dance",  for the entire wedding bridal party, etc.

engaged couples learning basic moves for the dance floor

bridal/ bachelor/ bachelorette/ parties

officiant:  pastor, priest, judge, etc.

outfits (rentals or purchases):  tuxedo(s)/ bridal dress(es), etc.

entertainment services:  hosts/ emcees,  dj's, performers (dancers, singers, rappers, acrobats, magicians, etc.)

floral services:  table arrangements, decorators, etc.

party favors:  suggestions, order placements & delivery to venue, etc.

production services:  photographer, cameraman, lighting, editor, etc.

honeymoon services:  suggestions, travel arrangements, hotel accommodations, etc.

and more...