WHERE IT'S AT
Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick  (#1-8)

The answers to the clues below will have something in common.

1. Where Quakers meet
2. Where the unacceptable lies
3. Where Poseidon rules
4. Where bribes are
5. Where foul blows land
6. Where the super-honest are
7. Where irrelevancy is
8. Where the daft have gone
9. Open to discussion
10. Not spoken or written, but implied
11. Strictly according to the rules
12. Excessive
13. Flight from New York to Paris, informally
14. Exactly right
15. Non-negotiable
16. In surgery
17. Not up to snuff (except in golf)
18. Of unquestionable integrity
19. Where life happens
20. Where bluebirds fly
21. Where some violators think they are

Answers:

1. Among Friends
2. Beyond the pale
3. Beneath the sea
4. Under the table
5. Below the belt
6. Above suspicion
7. Beside the point
8. Around the bend
9. On the table
10. Between the lines
11. By the book
12. Over the top
13. Across the pond
14. On the money
15. Off the table
16. Under the knife
17. Below par
18. Beyond reproach
19. Along the way
20. Over the rainbow 
21. Above the law