The snug is actually a very small area, an alcove large enough to fit one or few tables. Most pubs don't have snugs.

Some do have eating areas separate from the main bar, but most don't.

One pub I know has a very small snug, one that accommodates perhaps four people. I heard a story that this is across a parish boundary and the licensing regulations could once have been different there (cf. the pub in Puckoon), but I have no idea if that has any truth to it.