I found this, whether it's accurate or not I don't know. They moved back in to White City Stadium for the 1962/63 season, but recorded their lowest ever crowd for a competitive game of 3,261, which was lost inside the giant ground and they sensibly fled back to Loftus Road.
On the flip side, our average home attendances over the years:- http://www.european-football-statistics.co.uk/attnclub/qpr.htm Incredible that we somehow wangled our way out of that carthorse signing Statistics and records For more details on this topic, see List of Queens Park Rangers F.C. records and statistics. please log in to view this image QPR signed Christopher Samba for a club record £12.5 million from Anzhi Makhachkala in January 2013, then sold him back for a club record £13 million in July Biggest home defeat: 0–6 vs Newcastle United, 13 September 2016 Highest attendance 35,353: vs Leeds United 27 April 1974 Division 1 Highest all seated attendance 19,002: vs Man City, 6 November 1999 Division 1 Biggest win 13–0: vs Tavistock 18 July 2011 Pre-season Highest league win 9–2: vs Tranmere Rovers 3 Dec 1960 Division 3 Highest league loss 1–8: vs Manchester United 19 March 1969 Division 1 Most capped player: Alan McDonald: 52 Northern Ireland Most league appearances: Tony Ingham: 519 1950–63 Oldest player: Ray Wilkins: 39 years 352 days. 1 Sep 1996 Division 1 Youngest player Frank Sibley: 15 years 275 days Most league goals in a season: George Goddard, 37, Division 3 South, 1929–30. Most goals in a season: Rodney Marsh, 44 (30 League, 3 FA Cup, 11 League Cup) 1966–67 Most league goals in total aggregate: George Goddard, 174, 1926–34. Most goals in total aggregate: George Goddard, 186, 1926–34 Record transfer fee received: £12 million from Anzhi Makhachkala for Christopher Samba, July 2013. Record transfer fee paid: £12.5 million to Anzhi Makhachkala for Christopher Samba, January 2013. https://en.wikipedia.org/wiki/Queens_Park_Rangers_F.C.
I remember those games at White City, you needed binoculars to watch the matches. If 3261 is listed as the lowest crowd there I would be surpised as I think my dad and I were the only ones that ever went.