i stay at citi hostel just south of st. stephens green near harcourt st. the 4 person dorm room had en-suite facilities though using the shower with a push faucett was a challenge. the hostel is a series of connected townhouses so there are no simple ways to get to one's assigned room. very clean, though there was a fan or motor nearby that was annoying. about $28 pp weekend night in high season. no 2 day min on weekends that many dublin hostels require.