Florida has a massive criminal element, but Sherlock has an equally massive cocaine habit, and thus he finds it increasingly difficult to get by on private detective work alone. He'd rather cut off his arm than call Mycroft or Father for money (or any other reason), so he resorts to drastic measures: getting a part-time job tending bar at a tourist trap next to Universal Studios. The owner is a former client and agrees to keep his employment off the books. While the job gives him decent income and quite a few leads on new cases, the clientele can be maddening.
On hearing Sherlock's accent, many tourists fake the worst British accent since Dick Van Dyke and ask for "a spot of tea." After his first two days, Sherlock begins speaking in a Midwestern American accent while at work and tells everyone he's from Nebraska.
The stupidity doesn't stop there: every day he hears comments about the "historical accuracy" of the castle at Disney World, the "educational value" of EPCOT Center, and the supposed thrills of Space Mountain. (It's merely a magic trick. What do people see in these things?)
Sherlock's greatest fear is that all this idiocy is contagious.
A/N: Thank you phanpiggy and sevenpercent for suggesting the idea of Sherlock at a theme park! I put him just outside the theme parks so that he'd see more varieties of tourist and thus have more to complain about. :)
Dick Van Dyke played a chimney sweep in Mary Poppins and his performance in that film is widely considered to be one of the worst examples of an American actor trying to fake a British accent.