According to this blogger ("Big Homo"), Rehoboth Beach, DE -- where the real property is -- is apparently a hotspot for Washington, DC gays. https://bighomo.wordpress.com/category/david-brock/

Delaware makes me think of BIDEN ("Uncle Joe" and Beau). On a hunch, I put "Biden Rehoboth" into search engine. Turns out Uncle Joe and Jill were there celebrating his birthday.

http://www.delmarvanow.com/story/news/local/delaware/2016/11/20/vp-joe-biden-visits-rehoboth-beach-birthday-weekend/94162320/