The most mildly offensive cocktail in Philly? According to one blogger, it might be Shouk's guido cocktail:
Flavored with pomegranate, cardamom, and mint, Shoukâs cocktails are bold and, in the case of the Guido (Sambuca and Kahlua), mildly offensive.
Make Me Wanna Shouk [Blogalicious]
Shouk [MenuPages]
Shouk [Official Site]