In Tokyo for a week! Any one free to explore?

Hi! So glad I was able to find this forum/website.. I'll be in Japan for a week June Protected content was wondering if anyone would be free to meet up, go grab a beer? Check out a market? Do something fun? I'll be travelling with my father, and staying with my brother who lives there with his wife and kids. While the kids are napping, and brothers at work.. It would be nice to have someone to go shopping with or grab a bite?
Let me know! I'll be in the Roppongi area.
Thanks! Oh by the way, I'm 29 female.. Someone close in age would be preferred (although not necessary)