I will definitely keep that in mind and keep an eye out for the presence of a Lounge Crowd at the clubs I visit.I will second going with the local non-profit sailing center where the focus is on Sailing and not the Bar or Lounge. The founder of ours mentioned that he realized the folly of having the bar and lounge at the first club he founded when people started complaining that somebody had to do something about the boats and people in sailing shorts with their life jackets spoiling the place. He thought it was great to see so many especially whole families there to sail while the Lounge Crowd saw them as a nuisance that had to be eliminated.
If your in the South East then ignore those Northeners and wear clothing appropriate to Southern Weather in light colors and be sure to wear briefs under your sailing shorts (I shouldn't need to explain why). Many of our members wear light colored twill shorts and a vented cotton long sleeved shirt to better deal with the sun. Its hot and the sun beats mercilessly here in the Sunshine State.
Don't wear greasy lotions either or footwear that will leave a mark. If you carry a multi-tool, etc be sure its in a case that will not leave a mark on every thing you pass by messing up cushions, lazeretts, etc. Belts that can leave marks should be avoided too along with excessive jewelry. You may be required to go and retrieve any of your fingers that you loose in the rigging due to wearing a large gaudy ring along with clean up any stains.
Synthetics that can react with body heat/sweat leaving you smelling like you've been stewing in them for several days after a few minutes in the sun should be avoided. Had one guy that did not believe in deodorant so he was usually the one left at the dock and had to sail solo. Nobody wanted him to show up for a picnic sail or event with a cookout.
If the sailing center does not provide life jackets then be sure to bring your own. If you are using sailing center/club equipment then be sure to follow the rules about cleanup and stowing them afterwards. Many will require members who take out the smaller boats to flake the sails and stow them in the facilities sail lockers along with rinse and hang to dry any of the loaner life vests that they put on. As other mentioned be sure to offer and be available to assist with these tasks even if your just the guy turning the spigot on the hose on and off and reeling it up afterwards.
Pay attention to who's around you and watch the salty talk and humor. Some loose track when its a family type mixed crowd event taking place and then find they have some apologies to make. Really just common sense.
Thanks for the advice!