Tailgating

"A tailgate party is asocial event held on and around the open tailgate of a vehicle. Tailgating, which originated in the United States, often involves grilling food. Tailgate parties usually occur in the parking lots at stadiums and arenas, before and occasionally after games and concerts. People attending such a party are said to be tailgating. Many people participate even if their vehicles do not have tailgates" (Read more: here!)