Ball season doesn't start until the Christmas holidays.
At this time you will have a blast going to one of the many Oktoberfest-like celebrations all over Austria (primarily smaller towns). When traveling through towns, look at the posters announcing a Waldfest, a Burgfest, an Erntedankfest, the x anniversary of the local fire dept, community (Gemeinde), or just about any occasion, usually on weekends. Austrians love to party and all these are free events (just calorie-laden). Check prospective local official websites for upcoming events at this time. Usually these are the town name, followed by .at
For Vienna, see www.wien.info
Many Heurigen at this time (they operate on a rotating schedule, so your favorite place may not be 'ausg'steckt').