I wouldn't get the same train either, that's just putting further pressure on yourself to perform in that environment.

Combine K and Phil's comments above, and then read Snake Eyes: http://www.puaforum.co.uk/field-reports/3945-5-day.html

He basically sums up that 'street' or 'day' game didn't work out too well for him. There are many games (Street, Bus Stop, Bar, Cafe, Log Flume, Club, Sauna), so just try them out and see which you're more comfortable with/have most success with.

As for the two 15 yr olds behind you. Imagine what they'd have thought if you ended up making her laugh, flirted outrageously and got her number. Would you have felt good you impressed them?