Have you ever been approached by Gardai after visiting an apartment?

[AngelsFan]

The first thing a Guard tells you is that you have the right to remain silent. So remain silent. The burden is on him to prove you broke the law. If you are confident start filming the guard, ask for his name, number and where he is based. Ask for the nane of their Superintendent. Tell him you have a right to film for your own safety and for any official complaint you might make.

Your visit to an Apartment is none of his business whatsoever, you could be a 'journalist', you could be anything you want, you're fine so long as the girl(s) dont say you paid for sex, which I'm sure they wouldn't do. You could wonder aloud is he also a client, is that why he is interested? Make it awkward for them!!
If you watch YouTube Auditors the cops always back down when challenged. The cops HATE being filmed. But you need to be strong and confident without being agressive or abusive.

Firstly I realise this is conflicting advice from me and I'm not a legal expert.
But..
I don't think taking out your phone to film the guards is a very good plan in this instance. You have your unlocked phone in your hand now and I think there is some law they can use to confiscate your phone if they suspect you are in the process of, or just have committed a crime.
They can then check through messages and call log to establish you called or messaged the escort to solicit sexual services.
Of course you may have deleted these before leaving the escort's place but perhaps not.
And sometimes E-I ask for these if you wish to leave a review.
Personally I'd rather hand over a phone that they have to go to the bother of unlocking.
Fortunately I've never been approached by a guard on leaving an escort's place.
I think I would just give name and details and ask am I under arrest. If not I'll be going.
If I am I won't be saying anything without my solicitor present.