Testosterone gels and casinos

Recently the ABC, our national broadcaster, showed a program from the UK’s Channel Four
Testosterone : Are You Man Enough on effects of testosterone supplements.

One of the researchers cited conducted a trial on the effects exogenous testosterone on risk taking (gambling behaviour).

The results didn’t particularly surprise me, but I was curious about an application of this. If testosterone increases risk taking behaviour could casinos [e.g. in the US where testosterone gel is apparently available without perscription] make this medication/stimulant available to their patrons?