From USGIF regarding GEOINT 2020 Housing Reservations:
Any reservations booked through the GEOINT Housing Center have been already been cancelled with the hotel. There will be no charges to the card on file, and no further action is needed.
If you booked your reservation directly with the hotel or another hotel booking site, you will need to call and cancel your reservation.
For questions, please reach out to geointhousing@spargoinc.com.