Pregnancy Announcement Party!

So my husband and I are having a party to "celebrate the new year" but the real purpose is to announce our pregnancy!  Were struggling to come up with ideas on how to surprise everyone.  I've seen so many cute pictures of chalkboard signs and ultrasounds and dog announcements but were looking for more of a group/party announcement where we'd announce in person instead of posting a picture.  Any ideas???  Thank you!!