A quick reminder to all fellow wanderers that if you are in any major American or European city and forgot the guidebook at home, check out Party Earth. Based out of Los Angeles, this start-up has more than quadrupled in size in the last year. They offer objective and detailed tips on dining, drinking, sports and entertainment attractions compiled by journalists who work on location in 19 global cities. When the dark night dawns and you’re at a loss, check the site. They’ll hook you up.