Human beings are voyeurs. Simple as that. It’s why we’ll spend hours looking at the Facebook profiles of people we barely know and why we read entertainment magazines. And it’s kind of why an event like the Festival of Houses and Gardens has existed for 64 years. Hosted by the Historic Charleston Foundation, the festival gives participants entry into 150 private houses, gardens, churches, and other buildings. The festival offers tours through historic neighborhoods, period concerts, and a luncheon lecture series (which require reservations). The whole thing will kick off with a preview party on March 17 on the Battery, with cocktails, hors d’oeuvres, and Matt and Ted Lee. There’ll also be a Young Advocates Soiree; besides getting to go to the Preview Party, they’ll have an after-party with Irish beer and music from DJ Trailmix. And there’s also the Charleston International Antiques Show, with furnishings, decorative pieces, and fine art from the 17th through 20th centuries. The festival lasts through April 16.