PTP is an amazing event, but it is not a casual event. It is a conservative church event. PTP is unapologetically different from many other church-related events and activities.
Men and women are required to dress modestly throughout PTP (1 Timothy 2:9), including all worship services, classes, and activities. There is no compromise on this, and those not adhering to the modesty standard will be asked to change--including at teen events. (The policy applies to children who are school age and up.)
The PTP modesty standard includes no shorts (of any length); no low cut tops/dresses front or back; no strapless/spaghetti strap tops; no tank tops; no tight/form fitting clothes such as stretch/yoga pants/tight jeans/tight dress pants; no skirts/dresses above the knee (even when sitting); no midriffs; no other revealing/distracting clothing.