at SIN, note that the KF lounges don't have showers*. I don't think the TG lounge has showers either
*technically the KF lounge at T3 is under renovation, the temporary replacement lounge do have showers (not sure if *G has access to it for free, or when this arrangement will change)
https://www.singaporeair.com/en_UK/s...er-gold-lounge