They were probably on a trip from the big bike meet in Faro. It's next weekend from Thursday to Sunday. Put Moto Clube Faro in Google and find out all about it bananaman. Deep Purple are among the attractions.

yeah i know the faro rally is on,sadly i cant get away with sneaking off for the night as we only arrive on the saturday.Last year we were there same time in lagos for two weeks and both weeks it was either tuesday night or wednesday night you could hear bikes for hours from our vantage point on the hill at boa vista golf.
next year i will plan it better and make sure the faro rally is the middle w/e then i can negotiate an overnight pass to disapear to that.