Originally Posted by
Land-of-Miles
I would quibble with Soho as an "adult area", perhaps it was in the 60's and 70's but these days it is mainly populated with decent restaurants, nice bars and quirky shops.
All 4 areas you describe above tend to blend in to each other in the West End, Covent Garden, The Theatre District, Soho and Leicester Square all merge into each other.
I'm with you during the daytime but OP is looking at nightlife, and Soho is definitely different at night, though I've been there many times and always felt safe it's nightlife aspect is definitely "adult" orientated...