Hello,
try voluntary work or do a leisure course a college , do a sport or scrabble club, do your intrests when outside. If you go on dating sites or singles bars, your sort of in the mode of expectancy , rather than going about normally , its the unexpected that matters,

And dont forget conversing with guy is the same as talking to a girl .
I get like you with conversing , and start think I have to come up with a conversation that will be intelligent , funny , and everything all in one .

Bars only add pressure to do that. A dull conversation starter can be rescued with a humourus tag line , practise dry humour ,