Hi there
What a bummer.
It doesn't start until 2.00pm. If you left just after 2.00pm and nobody else had arrived by then, I can only assume that one of the two organisers may have been on holiday, with the remaining organiser running a little late. If you were to factor into account that the regular attendees may not have intended showing right at the beginning with them dropping in gradually as the afternoon progresses, then one may easily end up with the situation you described.
I'm sure you would have had company if you'd stuck around a little longer. If you think about everyone who goes to the munch, it isn't unrealistic for almost all of them to have other things on which may prevent them from attending one particular month, or not attending a full munch on the day. I once sat until 2.15pm way back when the munch used to start at 1.00pm, whereas two months prior to this around 15 people were already there by 1.00pm. Shit happens!
Summer in general has a strange effect on munch attendances - all over the country.
Recharge your nerves and attend September's Munch and get there a little later.
Dallas