I love this place...all of London seems to venture into this respite from the concrete and steel of such a large city.
Upon first entering this area, it is a wonderous area of sights and sounds and smells.
The Empire, the Odeon and other top cinemas in the area bring school kids and adults alike to see new films and to wander the area looking at the plaques and handprints in the cement that attempt to memorialize a few of the cinema greats.
The Half Price Ticket Booth beckons to those who yearn to see the talented actors of this wonderful town. I myself met Derek Jacoby in Leicester Square on my last trip to London.
The people trying to get a quick bite to eat on their short lunch time, the tourists that look in wonder at the sights that surround this area, and the gypsies that try and tell your fortune and give you a sprig of what they call heather for a 5'er...A quick tip about the gypsies...if you get away with not giving up any money, and you decide to accept the sprig of 'heather', throw it away as soon as you can, that sprig of 'heather' is a marker for other gypsies working in the Square or other parts of town that you might be a good mark.
Just be firm and keep walking, they mean you no harm, they are just persistant.
I have seen tourists take that 'heather' and put it in their lapel or other location, and be accosted by every gypsy along the route they were walking...walk with purpose, in all situations, and you should be fine.