If you want the kind of mood that this movie fails to achieve, go and watch Play It Again, Sam (1972), a movie brilliantly written but luckily, not directed by Woody Allen and more straight than Annie Hall. Annie Hall's success may be the biggest hint on why this loose borefest was made.
Dudley Moore and Elizabeth Mcgovern pairing have no chemistry and energy. Their straight performances clash with the comedic nature of the playful supporting cast. It's like characters of a different movie interacting with a funnier (but not much) one. Both performances are subpar especially Dudley's doozed minimal reactions to everything.
On a more technical note, the movie looks bad. VHS-level bad. Dull colors, insufficient lighting and blooming light sources everywhere, especially on the restaurant scene a distracting sunlight glare that even bleeds through Mcgovern head.
The soundtrack is the most carefully handled aspect of this movie, but still felt misplaced at some points.