If anyone is infected at that wedding (highly would be likely in the US and much of Europe right now), and if it's at all like normal weddings, it's highly like

If anyone is infected at that wedding (highly would be likely in the US and much of Europe right now), and if it's at all like normal weddings, it's highly likely that many people will become infected. The virus has an infection fatality rate of around 0.5%, so you're running perhaps a few percent chance of someone who goes to the wedding dying of CoVID-19. The secondary effects of accelerating the spread of the virus are much harder to measure, but potentially far worse.