  We present observations of disc-bearing stars in Upper Scorpius (US) and
Upper Centaurus-Lupus (UCL) with moderate resolution spectroscopy in order to
determine the influence of multiplicity on disc persistence after ~5-20 Myr.
Discs were identified using infra-red (IR) excess from the Wide-field Infra-red
Survey Explorer (WISE) survey. Our survey consists of 55 US members and 28 UCL
members, using spatial and kinematic information to assign a probability of
membership. Spectra are gathered from the ANU 2.3m telescope using the Wide
Field Spectrograph (WiFeS) to detect radial velocity variations that indicate
the presence of a companion. We identify 2 double-lined spectroscopic binaries,
both of which have strong IR excess. We find the binary fraction of
disc-bearing stars in US and UCL for periods up to 20 years to be
$0.06^{0.07}_{0.02}$ and $0.13^{0.06}_{0.03}$ respectively. Based on the
multiplicity of field stars, we obtain an expected binary fraction of
$0.12^{0.02}_{0.01}$. The determined binary fractions for disc-bearing stars
does not vary significantly from the field, suggesting that the overall
lifetime of discs may not differ between single and binary star systems.
