At our meetups, we'd provide quick feedback as a group to anyone who wanted to show some of their work or a design problem that they're trying to solve. We'd do 1-3 of these on any given night, five minutes apiece tops – max 15-20 minutes or so in total. The presenter would of course be welcome to follow up with contributors at the end of the meeting. Have a different idea? Email Jim at email@example.com.