Tyler Kennedy (20) and Siobhan Christine White (19) entered pleas when they appeared in the Royal Court on Friday.
White also admitted assaulting ‘Miss X’ at the same property on the same day.
She also pleaded guilty to assaulting the same man at the Old England pub and maliciously damaging a pair of sunglasses and a mobile phone belonging to him.
All the offences took place on 31 May.
The pair were remanded on bail until sentencing by the Inferior Number on 14 February.