Joining us for lunch?

In BeezNest Latino (the new name of Dokeos Latinoamérica), we have lunch together every Wednesday at a nearby restaurant. It's a tradition, and it's on the company. Today though, a few of us got there about 5 minutes later than the firsts, and were greated  with no seats left and two separate tables with people having lunch independently. This already happened once in the past (in over a year), but today I was in a particularly bad mood (doesn't happen much) so I decided to take action and avoid this repeating itself.