I'm stuck in Tokyo until January 13th.  I do not drink, and I'm not
interested in sex.  I was told I should go to Roppongi, so I went there last
night, but

1. I only saw about 10 Westerners
2. The streets were full of prostitutes and scammers trying to get you into
shady nightclubs
3. The few Westerners I spoke to said that Roppongi is the wrong place to
meet women, especially if I don't drink, and I'm not interested in sex.

Does someone know better places?