For those needing a Guinness, there are a number of Irish bars in Bangkok to choose from. They generally offer sports on the many TVs, and lots of traditional beers, too. Facebook links are provided to check out their most recent information.
The Blarney Stone

Soi 4, near Nana BTS station.
Centrally located in the very popular night-life area on Soi 4. Directly south of Nana Plaza.
Nana BTS (Skytrain) station is an 8 minute walk.
Lots of live music is on offer at this not-so-big Irish bar.
Fitzgerald’s Irish Pub

Soi 4, near Nana BTS station.
Also on the popular Soi 4, but directly south of Hooters. The bar has space for crowds watching sports, and a menu that brings in many visitors.
Flann O’Brien’s Irish Pub
(picture from Flann’s Facebook page)
Mulligan’s Irish Bar – Khao San
(picture from Mulligan’s Facebook page)
O’Leary’s Irish Pub Bangkok

Sukhumvit, Soi 15; between Asok & Nana BTS stations.
O’ Leary’s Irish Pub Bangkok is a traditional Irish pub in the heart of Bangkok. Grand opening July 4, 2023.
(Picture from O’Leary’s Facebook Account)
O’Malley’s Irish Pub in Bangkok

Silom, near Sala Daeng BTS station.
Located downstairs just off the main street. Sports are shown, and live music is scheduled.
O’Shea’s Irish Sports Bar & Restaurant

Sukhumvit near Phrom Phong BTS station.
A large Irish bar with a rooftop; shows sports and live shows.
– Located between Robin Hood and The Royal Oak pubs.
Paddy Reilly’s Irish Pub in Bangkok

Sathon 12 near St. Louis BTS station.
In the Silom area, on a street of other nice restaurants and bars.
Scruffy Murphy’s Irish Pub

Soi 23, Near Asok BTS station.
Located near the Soi Cowboy area; showing live sports and featuring a Sunday Roast.