Whether those forward decks on 14 and 15 are available to all depends on what ship you are on. Some still have those areas open for all. The E class ships do not. The Solstice, Eclipse and Reflection all have these areas open to all. Deck 15 on Equinox is Retreat only, but deck 14 with the basketball court is still available. The Solarium is adults only and I have never seen it crowded.