The Thought Gang by Tibour Fischer is actually laugh out loud funny.
+1. “Under the Frog” is also very good.
Most P. J. O’Rourke books are great (despite his republican leanings) – “Parliament of Whores” would be my favourite.
“Scoop” by Evelyn Waugh.
Any of the “South American” novels of Louis de Bernieres. Better known for Captain Corelli’s Mandolin but not many laughs there. Try:
“The War of Don Emmanuel’s Nether Parts”
“Senor Vivo and the Coca Lord”
“The Troublesome Offspring of Cardinal Guzman”
Full of outrageous Latin-American stereotypes but very funny.