At the rear of the triangular building which is home to the Wimbledon Theatre, there were originally two shops at street level. Below them, and at a slightly higher level behind them, were the various rooms of a Turkish bath.

These were restored and refurbished to create Steve Sotiriou's Bar Sia which opened in June 2002. The building is Grade II Listed, and the architects incorporated original features surviving from each of the original rooms into the new design.

The Bar Sia closed in 2012 though the premises themselves were still in use in 2013.