Collect a lot of keys from the wedding party/friends WITHOUT the
bride and groom's knowledge. Pass them out to as many women as
possible (swearing them to secrecy). During your speech, announce
the "The bride realises that the groom has had a lot of girlfriends
over the years. She would appreciate it if any of them who have keys
to his place could please return them."
This is the cue for all the women to bring their keys to the wedding
party table. Try to get a couple of pregnant women in the group and
maybe somebody's grandma.
