I suspect channel contention. It could be that a neighboring AP on the same frequency is transmitting or receiving large chunks of data on the same channel or channel group as the one your hotel AP is using. All I can suggest is using a different channel, which, as far as I know, is not an option if you don't control the AP. The AP you're using is probably set to the common default of channel 6, as are many other, possibly nearby APs.
There are 11 channels, each overlapping with adjacent channels by 5Mhz. According to Wikipedia, "There are 14 channels designated in the 2.4 GHz range spaced 5 MHz apart (with the exception of a 12 MHz spacing before Channel 14). As the protocol requires 25 MHz of channel separation, adjacent channels overlap and will interfere with each other. Consequently, using only channels 1, 6, 11 is recommended in the US to avoid interference."
The "jamming" you're seeing is probably unintentional, since radio transmissions by nature are RF interference to other devices on the same frequency, assuming those other devices are not "wanting" to receive that signal.
If you've got an ethernet cable, that might be better in this case.