I've Gotta Hand it to You: Today's theme made me think of Bob Fosse and Jazz Hands. Each theme clue has a Handsy meaning.
17-Across. Nondigital means of telling time: ANALOG WATCH.
  29-Across. Display after a poker player's call: CARDS ON THE TABLE.
  49-Across. Appreciation at a live performance: ROUND OF APPLAUSE.
And the unifier:
61-Across. Quick polling method, and what 17-, 29-, and 49-Across all are, in different ways: SHOW OF HANDS. Hand up if you sussed today's theme.
Across:
  1. Hotel amenity that may require a password: WI-FI.
5. Put up with: ABIDED.
  11. More, in Spanish: MAS.  Today's Spanish lesson.  Hi,
  Lucina!
14. Playmates: PALS.
  15. Negative campaign message?: VOTE NO.  Cute clue.
  16. Molecule in some vaccines: RNA.  Everything you wanted to
  know about RNA vaccines but didn't know to ask.
19. Plum's center: PIT.
20. Bar bill: TAB.
  21. Southeast Asian language: LAO.  Everything you wanted to
  know about the language of Laos but didn't know to ask.  The language is very similar to that spoken in Thailand.  Laos is a land-locked country that
  primarily borders Thailand and Vietnam.
  22. __ Valley: Reagan Library site: SIMI.
  23. Takeout option with egg rolls: CHINESE.  Yummers!
  27. Tool for opening wooden crates: CROW BAR.
  31. "Star Trek Beyond" actor John: CHO.  John Cho (né Cho
  Yo-Han; b. June 15, 1972) was born in Seoul, South Korea.  He also stared
  in the Harold & Kumar movies.  [Name # 1.]
32. Small vortex: EDDY.
33. Pigpen: STY.
34. Breathe heavily: PANT.
36. Place for a peel: SPA.
  38. Common promise from a procrastinator: SOON.
45. Stately trees: ELMs.
48. Be nosy: PRY.
54. Naval officer: ADMIRAL.
  55. Onion kin: SHALLOT.  What's the difference
  between Shallots and Onions?
56. Snoozes: NAPS.
57. Milk source: COW.
  59. Sault __ Marie: STE.  Sault Ste. Marie straddles the
  international boarder of the United States (Michigan) and in Canada (Ontario).
   The twin cities are connected by a bridge across the St. Mary River.
      Sault Ste. Marie claims to be one of the oldest cities in the United States.  Hi,
  Yoopers Phil and CanadianEh!  
  60. Brief "Oversharing!": TMI.  Textspeak for Too Much Information.  It has become a crossword staple, appearing in a puzzle
  just last week.
66. Play it by __: EAR.
  67. Taken from above, as photos: AERIAL.  Can you guess the
  city below?
69. Unenviable grade: DEE.
  70. Harden into bone: OSSIFY.
71. Email folder: SENT.
Down:
  2. Bond creator Fleming: IAN.  In addition to creating Bond,
  James Bond, Ian Fleming (né Ian Lancaster Fleming; May 28, 1908 ~ Aug. 12,
  1964) also wrote Chitty Chatty Bang Bang: The Magical Car for his son, Casper.  [Name # 2.]
  3. __ Building: Manhattan landmark named for its triangular shape: FLAT IRON.  The Flat Iron building was built in 1902 by renowned architect Daniel Burnham (né
  Daniel Hudson Burnham; Sept. 4, 1846 ~ June 1, 1912).
  4. Kitchen prep spot: ISLAND.
  5. Slugger's stat: AVG.  As in Average.
6. Archery device: BOW.
  7. Lang. of Florence: ITAL.  Italian is spoken in Florence,
  Italy, the home of David.
8. Separate: DETACH.
  9. Concert bonuses: ENCORES.  Theme adjacent.  I saw
  the Tina: The Tina Turner Musical recently.  There was a
  big Encore at the end of the show.  The cast got a big Hand before and
  after the Encore.
  10. Play-__: kids' clay: DOH.
  11. Onetime Dr Pepper rival: MR. PIBB.  We think we saw Mr.
  Pibb recently.  Mr. Pibb arrived on the scene in the summer of 1972.  [Name adjacent.]
  12. Cat or rat: ANIMAL.  Not only are they animals, but they
  are rhyming animals.  
  13. Political humor, often: SATIRE.
18. Beyond plump: OBESE.
22. Influences: SWAYS.
  23. Letters on a Soviet uniform: CCCP.  As in Central Committee of the Communist Party.  //  And 41-Down. Russian "no": NYET.
24. "Very funny": HA HA!
25. Lawn roll: SOD.
26. Conclusions: ENDS.
  28. Baseball Hall of Famer Mel: OTT.  Mel Ott (né Melvin
  Thomas Ott; Mar. 2, 1909 ~ Nov. 21, 1958) was born in Gretna, Louisiana.
   He played for the New York Giants for nearly 20 years from 1926 through
  1947.  Tragically, he was killed from injuries sustained in a car
  accident.  He was only 49 years old.   [Name # 3.]
  30. Far from laid-back: TYPE A.
  35. North African capital: TUNIS.  Tunis is the capital of
  Tunisia.
37. Swiss peaks: ALPS.
39. Wealth: OPULENCE.
  40. "... __ it seems": OR SO.
  43. New Deal president's initials: FDR.  As in Franklin Delano Roosevelt (Jan. 30, 1882 ~ Apr. 12, 1945).   [Name # 3.]  //
   And 1-Down. 43-Down job-creating program: WPA.
   Originally known as Works Progress Administration, later renamed to Works Projects Administration.   //  And 58-Down. Conflict during 43-Down's
  presidency, briefly: WWII.  Also known as World War II.
   [Name #4.]
  44. Team instructors: COACHES.
  46. Speedometer abbr.: MPH.  As in Miles Per Hour.
  47. Drastically lower, as prices: SLASH.
49. __ and raved: RANTED.
  50. Whoopi's "Ghost" role: ODA MAE.  [Name # 5.]
  51. Ballpark figure?: UMPIRE.  Cute clue.
52. Elevator stops: FLOORS.
53. Chapel fixtures: ALTARS.
  61. __ Paulo, Brazil: SÃO.  The city has an interesting history.
62. Clumsy sort: OAF.
  63. Go by plane: FLY.  //  And 65-Down.  Bygone
  jet, for short: SST.  As in SuperSonic Transport.
  64. Levy of "Schitt's Creek": DAN.  Dan Levy (né Daniel
  Joseph Levy; b. Aug. 9, 1983) is the son of Eugene Levy (b. Dec. 17, 1946).
   They look alike.  [Name # 6.]
And the Grid:
חתולה
 
 

