Having an engagement party forces you to have a sense of your wedding guest list early, as you shouldn't invite anyone who won't be invited to the wedding.; It is an extra event to plan for and pay for or to have someone else plan and pay for. Throwing an Engagement Party - The Spruce Please note: You are currently browsing img 10 out of the box engagement party ideas wedded wonderland that is 573x382px in size. This image is listed in garden engagement party decorations category. Throwing an Engagement Party The Spruce, 573x382 in 283.94 KB.