For what it's worth, the Irish Pub (next to the Sima Thani) is open again.
The new owner has an 18 month contract to operate the bar. She plans to be open regularly, every day. Opening time seems to be some time between 5 and 6 PM. She has a limited food menu and a bevy of Thai lady employees.
It's probably the nicest venue in Korat. So, if you're in the neighborhood, give it a go.
I'd like for it to stay open because it's the closest pub to my house and the only one I can easily get to by bicycle.