Fitness Collective is hosting an open house fundraiser on Saturday, March 29, to raise funds for the Brooklyn-based Hope Program, which serves New Yorkers whose lives have been shattered by poverty. During this event, prospective clients will have the opportunity to check out the Park Slope Fitness Collective facility and purchase a special 1-2-3 package, which includes 1 nutritional consultation, 2 group classes, and 3 personal training sessions for only $150, with 10% of each package sold during the open house being donated to the Hope Program. During the event, current members who donate to Hope can enact some sweet revenge on their trainers by having them perform least favorite exercises. Fitness Collective has also lined up a generous donor that will match all the money raised. For more information call 718-499-1849.