I love the atmosphere at the bar at Citricos at Grand Floridian! They really are the best bartenders, my daughter loves the non-alcoholic purple penguins, and you can get full dinner at the bar without a reservation.
We’ve done Riviera and Poly in August, so I can’t speak to what June might be like. I will say in early August the big pool at the Poly was packed but the quiet pool nearer our room in the longhouses was great. There is someone who will take your drink order from your lounge chair at the main pool, so that is a plus. After time at the pools, we appreciated the ability for both of us to shower at the same time in studios in both (but the bathrooms at Riviera are nicer). The longhouse studios at the Poly were shockingly large, so hopefully you all enjoy!