Which figure of speech is used in this text?
Emmy's Bistro used to be a great place to go for a delicious and carefully prepared dinner, but nobody goes there anymore: it's too crowded.

 - paradox
 - oxymoron
The text uses a paradox, a statement that might at first appear to be contradictory, but that may in fact contain some truth.
Nobody goes there anymore: it's too crowded at first appears to be contradictory, because if no one goes to the restaurant, then the restaurant should be empty, not crowded. However, it contains some truth: if a restaurant is frequently perceived to be too crowded, many people will no longer want to go there.