As per James email, here's a suggestion for Sunday's Sketch - there's a lively food market in the Peoples Park on Sunday afternoons from 12 until 4pm. This only works if the weather's fine of course! It's right beside the sea near Sandycove, so there are plenty of other spots too. Theres a nice teahouse in the park itself and a café called Walters nearby for after-sketch coffe & chat .
Forgot to mention it's the People's Park Dun Loaghaire!