  CAF\'E-BEANS is an on-going survey running on the 2.2 m telescope at Calar
Alto. For more than two years, CAF\'E-BEANS has been collecting high-resolution
spectra of early-type stars with the aim of detecting and characterising
spectroscopic binaries. The main goal of this project is a thorough
characterisation of multiplicity in high-mass stars by detecting all
spectroscopic and visual binaries in a large sample of Galactic O-type stars,
and solving their orbits. Our final objective is eliminating all biases in the
high-mass-star IMF created by undetected binaries.
