During a trip to Mangga Besar, I found those restaurants serving cobras in different forms (Sate Cobra, Cobra Soup, Grilled Snake, etc...). I was not really in the mood for trying but I took a few pictures...
If you are interested, they are quite easy to find, on the main street, approximately 2 kilometers east of Jalan Hayam Wuruk. You call also try this one more particularly:
King Cobra
Restaurant & Medication
Jalan Mangga Besar Raya No93C
Phone Number: +62-21 629 6087