'My Family And Other Animals', Gerald Durrell. Not a comedy, but fun to read and funny as well.
Second vote for Mr Pratchett's 'Small Gods'.
Stella Gibbons, 'Cold Comfort Farm' - a classic, in its class-riddled way.
Damon Runyon makes me smile.
Also, see if you can find a Best Of Beachcomber.
I think I'm showing my age here - most of these are pre-1940... (okay, that does mean I'd be showing someone else's age )