I will be in Bethesda over the weekend staying at the HGI. They charge $15 for parking. I notice there is a parking garage nearby that I may consider using instead; it is the Waverly Street garage. It says weekends are free and monday thru friday has a per hour fee. Is it ok to park in these garages overnight? If so, should i expect to only pay the hourly rate for the time my car is in on friday and nothing for the weekend?