The most common objective of dating sims is to date, usually choosing from among several characters, and to achieve a romantic relationship.
The term "dating sim" is also often used incorrectly in English as a generic term for romance-driven games (ren'ai games), a subject matter which is stereotypically associated with the visual novel genre.
Dating sims, or relationship simulation role-playing games (RS-RPG), are a video game subgenre of simulation games, usually Japanese, with romantic elements.
Many people provided counter-examples in the comments.
My personal experience also tells me that dating in Japan is completely feasible and a lot of my friends seem to be doing OK with dating here.
Then the real question is this: what is the difference between successful and unsuccessful people?
Typically groups of men and women will sit opposite each other and converse with one another, while simultaneously whispering discussions with their same-sex peers about which potential partners they find attractive.
Sometimes games are played to reduce tension and encourage a convivial atmosphere.