I really enjoy tailgate parties which are events settled around the tailgate of a truck
I haven't been to one of those in so many years.
They are a blast.  They started at sporting events, but have now spread to other events, even weddings!
O really? Never heard of one at a wedding, that's crazy.
There are some foods that are credited with being created just for tailgates
Nice! What ones of them are those?
Basically just variations of the usual picnic foods.  Burgers, brats, coleslaw, things like that