  We investigate the formation of quantum droplets at finite temperature in
attractive Bose mixtures subject to a strong transverse harmonic confinement.
By means of exact path-integral Monte Carlo methods we determine the
equilibrium density of the gas and the liquid as well as the pressure vs.
volume dependence along isothermal curves. Results for the equation of state
and for the gas-liquid coexistence region in quasi-2D configurations are
compared with calculations in strictly two dimensions, finding excellent
agreement. Within the pure 2D model we explore the relevance of the quantum
scale anomaly and we determine the critical interaction strength for the
occurrence of the first-order gas to liquid transition. Furthermore, we find
that the superfluid response develops suddenly, following the density jump from
the gas to the liquid state.
