New Delhi, Aug. 8 -- Runners around India haven't been able to stop talking about the registration fee hike for next year's Tata Mumbai Marathon - India's biggest mass participation road race which draws more than 50,000 runners on the third Sunday of January every year. Several runners complained on online forums and social media platforms while several others discussed on their training runs this week the Rs.5,000 registration fee for the full marathon, up from Rs.3,500. Despite the anger at the price hike and debate over whether running is still an affordable sport these days, more than 12,000 runners paid and signed up for the full marathon in a week since registrations opened on July 31, say sources at Procam International, the promo...