7 rounds are impossible as there are 8 games that need to be played at each of locations 1 & 2. Here is an example of a solution in 8 rounds that might be useful:
(D F) (B H) (---) (A E) (---)
(C F) (A G) (---) (---) (D E)
(A H) (C E) (B G) (---) (---)
(B C) (D H) (---) (F G) (---)
(D A) (B F) (H E) (---) (C G)
(B E) (D G) (A F) (C H) (---)
(G E) (A C) (---) (D B) (F H)
(H G) (F E) (D C) (---) (A B)