The League is an "elite dating app" that requires you to apply -- and supply your job title, college and LinkedIn profile. Big cities tend to have long waiting lists, so you might find yourself twiddling your thumbs as your application is reviewed. (Of course, you can pay to expedite the process.) The exclusivity can be a draw for some and a turnoff for others, but I'll let you in on a secret: I've seen most of the profiles I come across on The League on other dating apps, too. So at the end of the day, you'll probably see the same faces on Tinder, if you aren't deemed elite enough for The League.
Age-based niches: These sites are for people of a specific age. Baby boomers are overwhelmingly turning to the web to find a mate. Sites like Match.com and POF.com offer members a chance to search specifically for the age group that interests you, but SeniorPeopleMeet.com and OurTime.com are the two largest sites designed specifically for the baby boomer market.