There is a parking lot right after University road, it you don't turn. Otherwise, you may have to park on Commonwealth Avenue at the meters, which are unfortunately not free on Saturdays. The gym itself in down University road, on the left, before you reach Storrow drive. Another way to go is the get off Storrow drive before Kenmore at the first Boston University exit. This is University Road and the gym is the first building on the right.
Parking is as noted above.
Please do NOT park in the parking lot in the back of the gym. You will be towed if you do.