Oh, I'm going to sound like a big nerd...but here's some of the cool stuff I've done with my gents. 
- Spent a 12hr day at a Ren Faire (yes, both in full costume)
- Spent another full day at 
InConJunction and lots of time at 
GenCon
- Wandered around the 
IMA and 
Eitlejorg (with multiple fellows - I'm apparently a great tour guide)
- More movies and plays than I can count (some at a drive-in, which was delightful!)
- Wandering through used bookstores and suggesting titles to one another
- Visited the 
Exotic Feline Rescue Center and spent a whole afternoon there
- Helped one fellow shop for a wedding he was attending that weekend (which was oddly fun)
...that's all I've got off the top of my head, but there's likely more. Social engagements are one of my favourite things to do since it gives me a chance to get to know someone in a different setting than the usual.