Triana is a great place to stay, and Mario's place is perfectly located. The weekend art and craft market is only a few minutes by foot, and the local produce market is just around the corner, for foodies. We were there in October, but all rooms have air conditioning, so summer should be fine too. The river and bridge close by are very beautiful, all the tourist areas walkable and I am in my sixties. We loved Seville and hope to return.