11 stories:

*** Venus and the Seven Sexes (1949) • William Tenn
** Babel II (1953) • Damon Knight
**** Useful Phrases for the Tourist (1972) • Joanna Russ
*** Conversational Mode (1972) • Grahame Leman
*** Heresies of the Huge God (1966) • Brian W. Aldiss
**** {Now + n, Now - n} (1972) • Robert Silverberg
**** Slow Tuesday Night (1965) • R. A. Lafferty
** Help! I Am Dr. Morris Goldpepper (1957) • Avram Davidson
**** Oh, to Be a Blobel! (1964) • Philip K. Dick
**** Hobson's Choice (1952) • Alfred Bester
*** I Plinglot, Who You? (1959) • Frederik Pohl

Not usually ha-ha funny so much as absurd, but these stories are all unusual and interesting. The best is probably "Venus and the Seven Sexes" by William Tenn, a really terrific and hilarious story about contact between some of the sleaziest humans imaginable with a race of trusting creatures that have somehow evolved to intelligence despite the hordes of predators constantly pursuing them. Really not a bad one in the bunch, but other highlights are "Babel II" by Damon Knight and "[Now + n], [Now - n]" by Robert Silverberg.

A mixed bag, at least for me. There were some great stories and some others than kind of fell flat for me. Humor is relative.

This was a very funny collection of amusing science fiction stories. Good humor is sometimes hard to find in the field, but this book includes classics from Tenn, Lafferty, Bester, Silverberg himself, etc. I still remember reading "Useful Phrases For the Tourist" by Joanna Russ when it first appeared in Carr's UNIVERSE in 1972 and laughing non-stop like a loon for the best part of an hour.