Riva is always busy on a Sunday. Good Music, Good views and location.
We can enjoy a drink, snacks or bar meal, while sitting overlooking the bay. Unfortunately you cannot book a table on the decking. They tell me they get busy between 4 and 5.
They will not reserve tables. I will be there by 3.30 and grab a table if you want a seat please get there early too.
Late February I will book a Sunday lunch at Riva, but we are probably over eating too much at the moment and also trying to conserve expenses, I thought this was a good option while the weather is good.