Introduction The bright pages of the history of the 20th century are connected with the words “race”, “gender” and “social class”. Today, these issues remain burning ones and are actively discussed; contemporary science has also turned its attention to them. Race, gender and social class are the aspects of diversity that are in focus of researchers who work in the field of social psychology (Blaine, p.3). Nowadays investigating this matter is of big significance: studying the issues of gender, race and social class in social psychology provide background for understanding conflicts and discrimination connected with them. Considering that social diversity has not only inner impact on a personality (identification), but also on that outer (behavior) (p.17), the subject area of our study is external signs of gender, racial and social class stereotyping in everyday-life setting. The focus of our investigation is manifestations of gender, racial and social class stereotyping in serving clients in public catering: we will observe behavior of waitresses in “Café” and analyze it from the perspective of the mentioned aspects of stereotyping. Literature Review High research activity is connected with studying racial, gender and social class diversity and its signs (Blaine, p.3). There are a set of questions that remain in the focus of perpetual study, such as the “ratio” of inherent and social influence on racial and gender stereotyping, connection between identity and behavior from the perspective of social diversity, influence of stereotyping on relations et al. Much attention is paid to studying identity, stereotyping and influence of social diversity on behavior and relations at school. Fries-Britt and Griffin (2007) provide results of qualitative research that revealed difficulty that high-achieving Afro-American students had in disproving negative stereotyping. Rydell, McConnell and Beilock (2009) found that reminding about negative stereotypes about groups that students belong to decreases their performance, which corroborates that identity influences behavior. Lott (2010) discusses the impact of race, gender and social class diversity on attitudes, relations and behavior. In (Chryssochoou, p.35-41), different social psychological theories of prejudice are systematized: the connection between diversity and behavior is emphasized. Researchers pay significant attention to choosing groups that would give opportunity to get valuable knowledge on the mentioned issues. For example, in their article, Santon, Meyer-Lindenberg and Deruelle (2010) study such issues as racial and gender stereotyping. The peculiarity of the research is focusing on Williams syndrome children. One of the main symptoms of the Williams syndrome is mental disability; this influences cognitive, behavioral and emotive processes, which makes the research of particular significance: these processes have important role in forming stereotypes, and in case the corresponding functions are depressed, the research will provide more “ingenuous” results of studying race and gender. WS children have reduced social fear and tent to contact with individuals who would be considered not approachable by children without intel