There is a Special Rapid train every 15 min running from Kyoto to Osaka taking only 29min. It will not cost more than a normal train and i believe the line is called JR Kyoto line, check here for more
Enter the station name
I dont know much bout the clubbs sorry. I guess you want to stay in Osaka. I stayed at the youth Hostel outisde off the city in the Stadium. Its very nice but a bit institutional and to far from the city as well.
I wanted to stay with J hoppers because i had such a good time in Hiroshima with them, but it was booked out, so i dont know about that.
In Kyoto K´s House was quite nice.
Have Fun