The above poster is correct in that all of the playoff games will be livebon Sky Sports. However, sports bars are not really a thing over here, and you may struggle to find a bar showing US football on a Sat night in Dublin. Bigger hotel chains are perhaps more likely to carry the channel in their room (it's a premium satellite or cable channel, albeit verging on the ubiquitous). Your other option would be to watch it on the NFL official online service. I realise that the time difference is a pain, so PM me if you need help looking into it.
Machine-wrapped, with butter?
Yes, machine-wrapped, WITH BUTTER