Cafe Asan is in Suehiro-cho, 1 station (but you can walk easily) from Akihabara.
If you walk along the railroad tracks, suddenly neat white wall place appears.
This is 2k540. In there, cute zakka shops, designer offices, & food places.
You can try to sit on hammock, use free WiFi, try unique flavored drinks and Japanese-asian foods at Cafe Asan.