The text on the glass doors says "ВХОД", which is Russian for "Entrance". The logo on the glass features the word "ЛОКОМОТИВ" (Lokomotiv), suggesting this is a sports facility associated with the Lokomotiv sports society. The modern glass architecture and the rhythmic gymnastics decals indicate a specialized sports complex. Given the prevalence of Lokomotiv facilities in major Russian cities, I suspect this is in a city like Moscow or a regional hub. I am moderately confident in this assessment.

then: guess