Fabric chairs? Upholstered in light colors?? Where kids eat?? Segregating "those who eat alone"? Ok, we have a new genration, GnG's.
Moveable tables? As a previous food worker, that alone is a nightmare. Those round tables are not efficient. 4 at a round table does not equate to 8 at two round tables when pushed together. It becomes six at best and still taking up floor space of 8 or 10.
The "swish eyebrow" is in keeping; the arch is still there. Linger zone? I don't know...seems to be what kris pointed out, longer stays by the same crowd, and not neccessarily the crowd one wants "hanging out", as most people, MISTAKENLY are put off, frightened, intimidated, by teenagers. You know...the "others" may be too noisy, too avant-garde, too "new" for the stodgies.
I haven't eaten in a MacDonalds in 20 + years, but this is not going to bring me in. So I'm not the market, but even with free wifi, that dog won't hunt.