The place where Ram- Laxman had a meeting with Sugreeva was at Rishyamook hill in Hampi. At that time Sugreeva used to live here as he afraid of Bali. One of caves called Sugreeva Gufa (Cave) is located on the hill.
Valmiki Ramayana 3/54/1 to 4, 4/2, 5, 6, 7, 8, 10, 11 full chapters, 4/12/1 tp 13. Manas 4/01, 4/6/12.