This article studies the sociability evidenced in the fiestas and other celebrations held by the Breastfeeding Infant Clinic and periodically organized by La Conciliación Mutual Aid Society between 1902 and 1933 as recreational acts with educational purposes. La Conciliación (1902-1984) was founded in Pamplona as an exclusively male Catholic association (women were admitted from 1936) composed of workers, employers and protector members, with labor, healthcare, and economic objectives under a Mixed Board of Governors with representatives from the three cohorts. The description of the events and the analyses of the emotional practices are based on newspaper reports and the association's archives. The acts organized by the Breastfeeding Infant Clinic served to stimulate positive emotions and maternal feelings of piety and charity and to arouse a sense of social utility in the upper social classes. We acknowledge the regulatory component of the emotions that appeared in the fiesta of La Conciliatión: conferences and social events proposed a social model that reinforced the participation of members and their families in the association's ideological and religious goals. The performative character of emotions was designed to reinforce the identity of the members of La Conciliation and their social integration in the city. This model of sociability strengthened the project of La Conciliation.