This is said, by the band, to be a reason for the venue selling pizza slices—they enjoyed Dublin night-life, but disliked the relative scarcity of places selling good pizza slices and so opened both a pizzeria attached to the existing Temple Bar venue Eamonn Doran's and the Voodoo Lounge.
The band states that the venue sells pizza slices because they relished Dublin nightlife but were displeased by the scarcity of good pizza places. As a result, they opened both a pizzeria at their Temple Bar venue Eamonn Doran's and another establishment called the Voodoo Lounge.