Philadelphia's Library Company opens a gay history exhibit today: That's So Gay: Outing Early America, that looks at the questions of how we can know whether a person who lived in the past would be called lesbian, gay, bisexual, or transgender today. While there's no way to definitively answer these questions, the exhibit looks at the evidence of individuals who took part in same-sex relationships, wrote poems and novels celebrating such relationships, deviated from gender norms, and suffered for transgressive behavior in ways that are well-documented in the historical record. No surprise it's opening in the city that tapped Miss Richfield to demonstrate its dual appeal of history and gay nightlife. The exhibit is open weekdays through October 17th, but ManAboutWorld suggests visiting in early March, so you can also attend the LGBT party at the Philadelphia Flower Show on March 2. For more information on where to stay, eat and play in Philadelphia, check out the most recent coverage in this month's ManAboutWorld Magazine.