The event will be in Activity Room 2, downstairs from main floor. It is level with Friendship Blvd, where there is a secondary entrance to the Rec Center. Room 2 is not the activity room on the main floor, which is next to a large, potentially noisy weights exercise room on the main floor of the rec center.
Metro: the center is easy walking distance from Friendship Heights Metro (Red Line).
Parking: there is a large commercial parking garage with an entrance on Friendship Blvd.
That car entrance is right next to the downstairs access to Activity Room 2, but I saw no easy pedestrian exit to Friendship Blvd. Rates are $7 for 3 hours, and can be paid by credit/debit card.
Walking directions:If someone is driving you, it may be best to be dropped off at the downstairs access point to the Rec Center, on Friendship Blvd.
If you park in the garage, take an elevator up to the shopping center, and enter the Rec Center main floor via a plaza surrounded by several high rise apartment buildings. Then take the stairs or the rec center elevator down to Activity Room 2.
The walking time from within the garage is liable to be 5-10 minutes because of the elevator speed and making your way from there. Here is a map of the shopping center that you may want to print out. The Community Center is at the top of the map, next to Bloomingdales (but not accessible from within that store).