Pigalle has some cool shops, the most bass oriented is probably California basses, altough I have an impression they had relocated, not sure.
you're lucky your wife doesn't want to go shopping in Lisbon, then you'd really be toasted!!
"Good morning, I'd like to try a few basses, do you have any??"
" -Oh yes, we have these wonderful SQUIER and IBANEZ here..."
enter new store, repeat speech...