salaam

1st you gota be known in the area bro that way if you go to the youth and say bla bla they will obviously listen and have respect 4 ya, also if your come to their level and talk to them then it really works. i know it sounds great sayin "at the mosque theres gona be a speech or session and come to it" but lets be honest lol how much people actually turn up? so you gota go to their level and do dawah, sit wit em on the bus, tube, when playin footy, cricket, walkin home, whenever and soon you wil realise that once you get through 2 like 2-3 ppl they will go round tellin more people and then eventually you can ask the council to build another mosque in ya area inshallah