Your chance of having been infected by the exposure you describe is zero. Here is why:
1. Even if the dancers did not look "fresh" the odds are that they were not HIV infected, most women in such situations, even if they sell sex, are not.
2. HIV is not a hardy virus. It dies quickly when exposed to air.
3. As you note, the banana was likely mixed with lubricant, diluting any HIV theoretically (but improbably) there.
4. The amount of secretions you splashed with was miniscule, if at all. Thus the HIV content if present, was tiny
5. Your eye would have blinked if something was splashed into it (it cannot help itself) and this is a cleansing action.
Putting all of this togehter, your risk is zero. No one has ever been infected by a splash of genital secretions, despite the fact that such concerns have been voiced MANY times. You are not going to be the first. My advice- don't worry. This was a no risk "exposure". Testing is not necessary. Hope this helps. EWH