Graduation Party - Help please!

My mom is trying to plan a graduation party for my sister. She is looking for a restaurant with a private room for about 18 people. She wants something in Suffolk County, preferably north of the LIE, and between Huntington and Port Jefferson. So far, we've checked out . . .
Danfords, Port Jeff - Didn't like the room - Looked like a board room with florescent lights, etc.
Printers Devil, Port Jeff - Minimum of 25 people so a bit expensive but we're considering.
Marios, Setauket - A possibility.
Irish Coffee Pub, Islip - Nice but a little far.
Does anyone have any additional suggestions?
Thanks!!

What about the Country House in Stony Brook? Might be a little pricey though.
I'll keep thinking......oh, if you like Mexican Food, there's always Viva Juan's in Huntington, a little different, but fun!

I always forget about the Country House - And I drive by it every day! I will definitely give them a call.
Viva Juans is always great (I was there last weekend!) . I'm not sure if they have a private room - For some reason my mom is big into this private room thing.
Thanks for your help!

I also second the Country House...the food is just phenomenal!! My mother has already told me that she's having my bridal shower there (nice surprise huh!!! )!

However, I'm not sure if their private room will hold 18. What about just blocking off part of the restaurant...that's what my mother is going to do, because it'll probably be about 35-30 people.