When I was living in Massachusetts, I was President of the Boylston Chess Club in Boston (now Sommerville) for a year and served on the Board of Directors for four years. I focused most of my energy on expanding the club's tournament schedule.
The most unique thing I ever did was hold three tournaments inside South Station (a very busy commuter rail/subway station) in 1999 and 2000.
For those who haven't played live tournament chess, playing in a train station was extremely unusual. Tournament chess players demand absolute quiet during play. But, of course, in a train station, that was impossible. There were constantly commuters moving through the station and announcements over the speakers.
Despite all the unusual distractions, the event was very popular with the players. The two-day, six-round, game/60 tournament got 73 players if I'm remembering correctly.
A full gallery of photos can be seen here.
The trains arrived no more than twenty feet beyond the far wall/windows.
Just beyond the barrier in the rear, was an entrance/exit to the subway.
In addition to the tournament, Jacob Rasin (one of the Boylston Chess Club's strongest players) played a simultaneous match against all comers. Due to limited space, I think he was limited to about fourteen opponents. Given that Jacob could beat about twenty opponents while playing blindfoled, he obviously didn't have much difficulty.
For the record, I wasn't the tournament director of these events. My role was in organizing the event in advance.
If older posters are experiencing deja vu, I created a similar thread in OOT back in 2005.