I agree with this -- on ships with studio lounges there is an actual solo host that helps arrange meals and shows, etc. On the Joy it is self-led, so it's not as good for solos if that is something that matters to you. For me, it depends on why I picked the cruise if that matters to me - like if there isn't a lot of sea days or down time I don't care, but if there is a lot of time on the ship I prefer to go on one with studios (even if I am not staying in the studio itself -- they let you into the lounge for the meet-ups).