There are some non farang/touristy gay bars on Ramkhaemhang road. It will cater mostly to men, but it's close to a university, so maybe the women won't be far
I found this list on the internet, but can's say how old the information is. I visited 2 of the places 3 years ago. It had a nice vibe. But English is rarely spoken there.
Blue Club
2/F 3161 Ramkhamhaeng Rd (between Soi 81 and Soi 83), 02-732-2360. Thai-Thai music pub.
Club Love Remix
Lamsalee gay zone, Ramkhamhaeng Soi 89/2, 02-378-4345. Thai-Thai club popular with young gays and university students.
Crazy Dance Party House
Lamsalee gay zone, Ramkhamhaeng Soi 89/2, 089-444-9669. Thai-Thai club. Young crowd, lots of university students.
E-Male
62-64 Ramkhamhaeng Soi 24, Utopia Map, 02-319-6772. Local style Thai country music pub featuring drag, lip-sync, cabaret, fashion and handsome man shows. Local crowd.
Finalle
Lamsalee gay zone, Ramkhamhaeng Soi 89/2, 081-503-5398. Late night gay spot for the young Thai-Thai crowd. Cabaret shows.
Gay Town
02-314-4864 ext. 1, 081-268-7930. Another Ramkhamhaeng in-your-face homo hangout.
ICK UTOPIAN VERIFIED JAN 2011
Lamsalee gay zone, Ramkhamhaeng Soi 89/2, Utopia Map, 081-442-9472. Thai style disco-pub attracting a local and student crowd late at night.
MTV Remix
Ramkamhaeng Soi 24, 02-319-8340. One of the many little gay venues opening near Ramkhamhaeng University. Expect very Thai style entertainment, young crowd, pop beats and Thai conversation (if you can even hear each other). Lerrrttt khaaa! (faaabulous).
Zee's Zone
Lamsalee gay zone, Ramkhamhaeng Soi 89/2, 086-733-8273. Another Thai-style club attracting locals and university students.