This has been covered in depth and anyone who asks that question likely doesn't have the pedigree (10+ years of trading profits) to walk into an actual shop and be given trading capital with no strings and no guarantee for the firm. Just ask yourself the question, would you give someone who "claims" to be a great trader you trading capital to trade for you?
So, the only choice for 99.9% of the people is to go with a prop shop where you need to put up a risk deposit to get additional trading capital. Go with the reputable firms that are discussed on this site like Bright Trading, Maverick Trading, Echo, JC, etc. Just saying these firms have a good history of on time payouts and returning capital to traders but your trading success is up to you.
Good luck