  We discuss the prospects of observing double parton scattering (DPS)
processes with purely leptonic final states at the LHC. We first study
same-sign W pair production, which is particularly suited for studying momentum
and valence number conservation effects, followed by discussions on double
Drell-Yan and production of J/psi pairs. The effects of initial state and
intrinsic transverse momentum smearing on pair-wise transverse momentum balance
characteristic to DPS are studied quantitatively. We also present a new
technique, based on rapidity differences, to extract the DPS component from a
double J/psi sample recently studied at the LHCb.
