SIS Optimisten is a cafeteria that offers a varied selection of dishes, including meat, fish and vegetarian products. The buffet also includes bread spreads, wraps, a salad bar and smoothies. In addition, freshly baked pastries and oatmeal are served, giving guests the opportunity to choose from various breakfast and lunch options.
The cafeteria has many seats, most of which are equipped with power outlets, making it a suitable place for students and workers who want to work on a computer. Every day, hot dishes are offered in buffet form, and special theme nights are arranged such as taco buffet every other Friday and koml on the last Thursday of the month. Hot wrap is served every other Wednesday, giving guests variety in the menu.