  Using Monte Carlo simulation, we have studied the percolation of
discorectangles. Also known as stadiums or two-dimensional spherocylinders, a
discorectangle is a rectangle with semicircles at a pair of opposite sides.
Scaling analysis was performed to obtain the percolation thresholds in the
thermodynamic limits. We found: (i) for the two marginal aspect ratios
$\varepsilon = 1$ (disc) and $\varepsilon \to \infty$ (stick) the percolation
thresholds coincide with known values within the statistical error; (ii) for
intermediate values of $\varepsilon$ the percolation threshold lies between the
percolation thresholds for ellipses and rectangles and approaches the latter as
the aspect ratio increases.
