What if social networks could help you find something to do tonight? On Snapchat, users can now be guided by a new tool that’s billed as a kind of “Tinder of events.” As well as helping users discover nearby shows or concerts, this new feature facilitates the purchase of tickets online, at a time when shopping on social networks continues to gain momentum. On Snapchat, users can already use the app’s interactive map to see where their friends are, when geolocation is enabled. It’s a practical tool that is now taking on a more commercial dimension. Snapchat has partnered with Ticketmaster to ma…