[monster]

A little more background, if you please, rkz...

Were you alone? if so, that may be it, wheelchair or no
With regulars at that bar? if so, then their curiosity would be peeked
with a group of other people who had never been there before? then you probably stuck out like two sore thumbs rather than one.
were you near the door? If so, you're probably the first thing the saw while adjusting to the light, adding an extra element of suprise
Was it easy for you to get it?
If not, you may be the first person in a wheelchair they've seen in there and if they never go anywhere else it might not occur to them that people in wheelchairs can visit bars.

Whatever the scenario, it sucks but it's life. You know that. people will look at the different, Some people do not have the manners to apologize or explain when caught out, some won't even make eye contact. That makes them the lesser person, but maybe, next time, they will.