I like tailgate parties
Hi! So do i actually, there fun because they're a social event held around the open tailgate of a vehicle 
I loved going to them at football games.
I'm not surprised :) they originated in the US, they involve consuming alcohol and grilling food, perfect to have at a football game! 
Sometimes they get rowdy!
True, but i guess that's normal to have at a large social event. Also because many people attend Tailgate parties even if they don't have a vehicle with tailgates ! 
Yes, I do not own a tailgate haha
Me neither, but we're still tailgating! as that's what people are referred to who attend these partys  
the party never stops!
haha thats right! I love these tailgate parties because they involve people bringing their own alcohol, barbecues, food etc.