Dave Grohl recently spent more than 24 hours volunteering at a barbecue for homeless people.The Foo Fighters star showed off his skills at the grill after arranging a delivery that included brisket, pork and ribs for a shelter in Northridge, California, last week. Grohl spent hours preparing the food before manning the grill outside, even throughout a storm which saw the site deluged by rain and hail.He and fellow barbecuers took turns smoking the meat overnight, until it was ready around 3pm the following day - and the artist then helped serve dinner later that evening.