you say club, bar drinks... you could accidentally spill a drink on him/her and then attempt to mop it up while also 'finding out' if there's any eh.. ahem... lumps :-)
I've been to Thailand three times. Its a MAN. Possibly had the bits taken away ... Look for tell tale signs, like big hands, slightly masculine face, possibly bad skin. Could also have had adams apple taken away .. keep your distance. Can't you go for something a bit (or a lot) more natural. this one is a gold digger .... and will send all your money back to her family in Thailand ... mark my words.