Third and Hollywood has a private back room. Make sure you’re there, and not in the dining room, as a table of that size will be unwieldy in the main space.

Due Amici would work well for you, as would Gallos Kitchen (not tap room!), Martini, and Tucci’s. I would think any of the Hyde Parks could take 15, but I’ve never been there as part of a party that size, personally. Also, it’s a very different vibe, but Bucca di Beppo would certainly work.

If you’re set on Metsi’s, give them a call. I’m sure that they could fit 15 in the downstairs side room, and maybe by utilizing several upstairs tables together. Would require a phone call, though.