In my opinion, you need to go to bars. Girls go to bars to get laid. As long as you play it cool, smooth and mature, girls are going to dig it. Make sure you are dressed very well, groomed etc. Girls find mature guys attractive. Especially girls in their 20s since their experience is usually with boys their own age who are immature. Use your age to your advantage. I´m 28 and I get with early 20´s all the time. Obviously my age difference is less than yours BUT the same principles apply. When they tease me and say "Omg you are so old" .. (I know this is a shit test and they are trying to see if I´m confident in myself) , I just turn around lean in slightly and say "Well then you can call me daddy" with a cheeky smirk with complete eye contact. I ONLY do this when the conversation has started off well. It works like a charm.