The album peaked at number 39 on the UK albums chart in April 1999.[3] On 22 July 2013, the British Phonographic Industry awarded the album a silver certification for sales of 60,000 units.[4]
John Bush of AllMusic found that this collection was a good representation of the singer's work. "Despite the conscious kitsch in effect with the title, the Andy Williams compilation In the Lounge with... collects some of his breeziest pop crossovers during the late '60s, whether Brazilian or Broadway or folk or the stray rock cover. Unlike most jazz-era vocalists (those who had debuted in the '40s or '50s), Williams had no trouble crossing over. He gave the material the proper amount of respect -- never too much nor too little -- and his choices for recording and arrangements were quite good (evinced here by 'Windy,' 'Spooky,' 'Up, Up and Away,' 'Sunny,' 'Raindrops Keep Fallin' on My Head')."[2] Bush also warned, "Obviously, this is going to be musical furniture for many a hipster or wannabe, but don't discount the power of Andy Williams's style and finesse. The same talents of easy elegance that brought 'Canadian Sunset' to the charts are the same that appear on 'Pretty Butterfly.'"[2]
