Seven and Seven
Season 2, Episode 10, “Mixology Certification” (2010) · Troy Barnes
On his 21st birthday, Troy orders his first legal drink, a 7 and 7 (his late uncle's favorite), ignoring Jeff and Britta's warning that it's uncool; he leaves it on the bar and drives the drunk group home.
Sources: Wikipedia: Mixology Certification; Miss Charming (Cheryl Charming) - Cocktails in Television