When I used my Infinia PP in Bengaluru last week. The receptionist said something similar, "Sir Bank will let you know the charges". I said it's fine and she swiped. I have used Infinia PP 6 times in last 2 months in domestic airport lounges.I had not seen this thread earlier but recently visited Hyderabad airport lounge along with my friend. Unaware of this issue I swiped my PP , and my friend also had a PP for another non HDFC card. He was unaware whether his PP can be used in India or not. When he swiped, the receptionist confirmed to him that this is not free for him and he will be charged. So , Infinia PP would be chargeable then this information must be known too.