I got us a George Foreman indoor/outdoor grill for Christmas (alternately sold under the Salton name, in a box that says Toastmaster made it -- go figure).
It's a big round platter 17 inches across (240 sq in), with a round dome lid, like my charcoal Weber grill has, and it sits on its own stand, like regular outdoor grills. It doesn't have the hinged upper grill plate like other Foremans meant for tabletop use, just the bottom plate, but with the same ribbed design and slant that directs liquids to a collection cup underneath.
It works really well, keeping the smoke outside and freeing up the kitchen, and in fact the first time I tried it I was surprised how quickly it cooked fairly thick steaks. My main concern had been cooking power, since it's only 110v, all we're allowed to use on our condo balcony (no open fires from gas or charcoal, so my Weber's in storage).
I'd looked at other electric outdoor grills, but they had an exposed heating element at the very bottom of the kettle, and wasn't sure that would create enough heat, plus the drippings would make a real mess to clean. The Foreman has a removable non-stick surface that makes direct contact with the food for faster cooking.
There's no real secret to Foremans; we have a frying pan with those ridges, the idea being to keep the meat off the pan and not stewing in its own fat & grease. Foreman adds the surface slant and a collection cup, to make sure liquid doesn't pool under the food and make contact.
Here's ours, bought through Ace Hardware for $84.99 USD.