Why would you want to come all the way to Ulan Bator, only to end up drinking in an Irish pub? Good point. However this brand new bar is the place to be in Ulan Bator at the moment of writing. Packed every night with excellent live music (not just cover versions of Hotel California), the Irish Pub has very little Irish about it, aside from the token (bad) Guinness. Stick to local beers or indulge in sharing a bottle (or more) of Chinggis Black vodka like the locals. Nice outdoor patio in summer.
Opposite Khan Brau
Is this your business?