As the current duke I feel it's my duty to write a review of Hush.
I haven't had any food at Hush so I can't comment on that. I also don't expect to be going back very soon because I've mainly used Hush for Friday evening drinks on it's somewhat secret back patio. While all the patios on John St are packed you can easily sneak around the corner, through the 1st floor level of Hush, and up the stairs at the back for their 2nd story patio. It's got tables for 4 or 6 and a few loungy couch areas for getting cozy.
The service was pretty solid, but the waitresses do have to run up and down the stairs with all the drinks, so don't expect it to be too speedy. The prices are average, as is the decor.
Nothing much special about the place, but it does the job nicely when you need some booze and sun to forget about the work week.