When you click a tag and see a listing of activities, the headers ("equipment" and "rules") are inline with the text. Where it should read like:

  Equipment
    foo bar and baz
  Rules
    blah blah blah.

it looks like

  Equipment foo bar and baz Rules blah blah blah.

That is hard to read, and ugly.

Also, the colors aren't so pretty.

Neat site though. Clever premise.