Continuing the theme, OP might want to check what channels are in use nearby.
If neighbours are already slotting into 1,6,11 there is no point in going to 1,5,8,13 (and vice-versa) - it is better to stick to existing pattern in the environment unless like MHC you can do something about it,
And I'm sure MHC has not been naughty and turned their APs down to minimum while blasting away at full power and 40MHz channel widths ... now that
would be greedy
InSSIDer (Windows) and WiFi Analyzer (Android) are a couple of examples (plenty other free ones) that can show what might be a good channel for each location..
Broadly agree with E7er but would use same SSID and different channels, though at 40m apart it may not matter so much inside.
Unfortunately most consumer gear seems to contribute to channel congestion by being preset to a max power when they could offer during install to set the power level according to the most distant item you want to connect.
prompt $P - Invalid drive specification - Abort, Retry, Fail? $G
prlzx on n e w n e t Max ADSL
Edited by prlzx (Mon 12-Sep-11 00:01:19)