In a large bowl, mix together ground beef, crumbled bacon, feta, Worcestershire sauce, garlic, and black pepper by hand. Form into patties.
Place patties on grill and cook for about 5 minutes per side or until done. Burgers may also be cooked on a skillet or in the oven if grilling isn't possible.
Preheat oven to 400 degrees Fahrenheit.
Cover baking sheet with foil. Place baking rack or several skewers on baking sheet. Spread sliced bacon on the rack or skewers. Bake for 12-20 minutes. Check frequently starting around 12 minutes. Bacon goes from not done to burnt very quickly.
Move the cooked bacon to a plate lined with paper towels.
Set up burgers, bacon, buns, and toppings for everyone to assemble their burgers. Call in the hordes to come eat.