I think you might be approaching the problem the wrong way. I don't think us ENTP's "go" anywhere too specific. As extroverts, we're often out and about, but the NTP aspect makes us rather eccentric so we could really be doing anything that interests us.
A better way to find ENTPs is just to talk to people. If a woman brings up a theoretical problem to me, my eyes light up. I'll be immediately interested in the conversation, and will just need the slightest affirmation of interest from the lady to start espousing. Us ENTPs just LOVE to talk about ideas and theories. We have a bit of difficulty reading people, so just a standard interested reaction is probably the best way to keep the dialog flowing. Good luck, we're definitely out there.