The odds are exactly that, depending on how often you partake, what type of establishment, what girl, clientele, what services you get (ie. body fluids), etc.
List is too long of what is out there, but more common ones like genital warts and urinary tract infections (several) have been noted in other threads, as well as plantar's warts, but are all treatable.
The more serious ones nobody seems to talk about (herpes, gonnorhea, syphilis, HIV, Hepatitis) most likely are out there, but admitting would bring another aspect to the discussion and I doubt that you will get a lot of feedback in that area, but will see what everyone comes back with.