These circle and ring room dividers separate the kitchen space from the dining table. I think many people are faced with whether or not to separate their kitchen space from their dining space. On one hand they think of accessibility and on the other hand they think of the serenity a detached dining room can provide. These Mo-bi-le-O's by Wingard Home come in sets of six for $89.
A see-through curtain can help add ambiance in an open space like a loft or studio apartment. The opaque curtain gives some tranquility to the bedroom as well as defines the area. Hanging the panels with some space in between gives the illusion of a doorway. West Elm sells these curtain panels for just $24 each.