Because of another thread, I actually sent an email asking this exact question to the Anaheim restaurant. I also asked if the minimum beverage requirement had to be just alcohol for the adult in the party (because I don't drink). Here is the reply I got:
Yes, those under 21 can sit at the tables in the bar, but not at the bar
itself(according to CA law). The beverage minimum can be non-alcoholic,
it is not required to be an alcohol drink. The Happy hours are Monday
thru Friday 3pm to 6pm and 9:30pm to close. Hope you enjoy your stay in
Anaheim. Let me know if you have any other questions
Joe Luby
McCormick & Schmick's Anaheim
So....we'll be there one evening the first week of May to check it out. The food sounds yummy and the prices will feel so good after Disney, lol. Plus it's literally across the street from our hotel, yipee!