Marshall Performing Arts Conservatory ( http://www.marshallperformingarts.com/, near the intersection of Menaul and Texas)
offers classes secifically to boys at half-price, which comes to $22.50 a month.

In addition to ballet they offer hip-hop, breakdancing, and many other classes; all are half-price for boys.
The boys' ballet class is Tuesday evenings at 6:30.
There's no embarrassing uniform, they just wear comfortable clothing and socks.