If you know any simple tricks involving flash paper it always draws a crowd at night. People instinctual seek out fire, like moths lol, so use some to really kick out a message.

Try Sankey's In a Flash it's pretty effective as a crowd drawer. You can make one yourself if you have patience. The signed card get's a good reaction from men and the coin tends to get the women involved.

Try fast hard illusions when you have no crowd and when you get a large crowd move to longer effects with lots of build up.

Have fun