  We present a simple and versatile method for calculating the maximum capacity
of public spaces constrained to social distancing, following the recommended
measures of the WHO due to the COVID-19 pandemic outbreak. This method assumes
a minimum required distance of two meters between persons and is tested in four
actual plazas. Additionally, we estimate public space capacity in case of
public events, such as markets or concerts. We believe our method will directly
provide guidelines for crowd control in the so-called "new normality", serving
as a first step for future and more accurate developments.
