Let me guess—you love to sail, but you a) don't have a vessel at your disposal; b) don't have friends who have vessels at their disposal; c) always get sidetracked on your way to the snooty sailing club. Gotcha. May I suggest just one more way to satisfy your sailing bug? Head to Summer Sailstice this weekend just off Treasure Island to celebrate the longest days of the year, watch a mini-regatta, take part in a treasure hunt and sail for free. Yes, free. First come, first served. The dock opens at 11 AM on Saturday, June 19.