Ami did not fail to notice the additional alcoholic beverages Julie brought along, but after she overreacted with Peter, she's trying not to make too big a deal out of the people who decided this was a BYOB. The rest of them are adults, after all, and that's their prerogative, as long as they don't fuck up the party for anybody else.

Buuut a little while later, she happens to be near the DDR machine when Julie starts looking for an opponent. And Ami hasn't played DDR in a while, so it is tempting...

She nods, but puts her hands on her hips. "Okay, but you better not drunkenly smack me in the face or something. I reserve the right to call you a cab if you do!"