I'm an out of state gal hosting a business dinner. In an ideal world, I would like to find an affordable (around $35 per person w/o alcohol) restaurant with scrumptious food. This is a young, responsible crowd so an overly stuffy place won't do. We want a comfortable restaurant where we can mingle without bothering other patrons. A semi-private or private room is preferred but not necessary. What matters is great food. Any suggestions around Back Bay / Pru area?