At Grassmarket Centre's Old Foundry.

86 Candlemaker Row, Edinburgh EH1 2QA
(Edinburgh Fringe venue 27)

Edinburgh Fringe venue 27.  The postcode EH1 2QA. 

Located in Edinburgh historic Old Town, the Grassmarket Centre is adjacent to Greyfriars Kirk, being at the top (west) end of Cowgate and at its junction with Candlemaker Row.

(If it helps, because this is in the part of Edinburgh which is at two levels, the venue is almost below George IV Bridge).

There is a Just The Tonic box office (linked to the Fringe box office) open at the venue until 11pm, plus a cafe and bar open until 3am.