Some definitions.

The worst thing is when the cute barista you've been making eyes at gets off work and leaves.

The second worst thing is when the nice person you met shakes your hand really hard and smooshes your knuckles against your torrey ring.

The third worst thing is when the girl in the nice green jacket at whom who you started making eyes once the cute barista got off work also decides to leave.

The fourth worst thing is when you ask another barista (who is pretty cute, but at whom you haven't been making eyes of any kind) to tell you in all honesty, as a human being, whether the coffee shop's snickerdoodles are any good, and she says "yeah, they're gooey" and then the snickerdoodles turn out to be mediocre and salty.

The fifth worst thing is when you burn your tongue on your scalding drink.

Ooh. The sixth worst thing is when, out of force of habit, you look to where the girl in the green jacket was sitting, and find a scruffy-looking middle aged man sitting there instead.

A funny thing is when you are scanning the coffee shop to see if there might be anything to qualify as a seventh worst thing, but being repeatedly met with things you actually consider generally good, nice things, such as:

when all the chess pieces on the chess board are mixed up and shoved to the side of the chess-board-table because somebody was penning a hand-written letter there;

when there are really nice, almost beautiful, wooden chairs strewn about;

when there's a little boy drinking out of a paper cup with both hands while talking to an old man.

Another funny thing is when you start scanning the coffee shop for good, nice things, and end up only finding things that strike you as generally okay, unmentionable, and quotidian, such as:

the greenish/yellowish/tannish color of the walls;

the slightly irritating yet negligible grammatical/conceptual sloppiness of defining nouns (such as "the worst thing") with a definiens of the basic structure "is when x."

the small talk between customers and baristas.

Another nice thing: when the barista calls out "David, coffee at the bar!" and everybody in line discreetly scans the room to discover who this "David" could be.