Would a group of 20 or just under be able to sit together? I have a large group trying to meet up somewhere for food/drinks, and this looks like it could work. On a Saturday at noon. Would that be something I'd have to call in for?

When I went a saw a whole family gathered at a large table. Plus there's more seating in the rooftop... but I would advise to go b4 the rush so you can get a seat outside. 1st come 1st serve...

I do not think calling in would matter either way, but noon might be a decent time for that, since the Food Lab opens at 11:00 AM. Especially if someone arrives a little early, one should have little trouble moving tables to accommodate a large party.

I would say yes, but it really depends on the Saturday and if their are events going on downtown. You can always check out Google maps to see what the crowds are like. Lake Alice or the Hide Away are also an option, but they won't have the variety of delicious food to choose from like the Food Lab.

Umm maybe or you can get tables together they have outside seating also. But it does get packed with lots of people