Meet Market Adventures is not really a dating service but that was the only category available that was applicable to them. They organize events for single people, some a half day only, some longer such as cruises. My experience with them is that they charge a fee for these half day events for singles and it appears that not much planning or thought goes into them and the locales where they have organized them for would have similar events at the same cost or perhaps even less. What particularly raised my ire is one event that they had promoted as a "day at the firing range..." Myself and twenty other singles went to a firing range and expected that we would be firing three or four modern weapons all on our own for as many times as we wanted within a span of an hour. What actually happened was that we were allowed to fire any where from four or five shots from three weapons including a shotgun, rifle and revolver which were all replicas of those weapons from the early 1900's. The cost for this event was $59.99 plus tax. All of the participants felt ripped off in that we thought we were essentially going to be shooting a virtually unlimitted amount of rounds or bullets during the allotted time. Instead all twenty of us rotated through the three weapons.
It was only when I threatened to report the company to the Better Business Bureau and take them to small claims court did they finally refund my money onto my credit card and in fact only refunded to me $49.99 plus tax which they claimed was the price of the event when I signed up for it , which was a lie.
You'd be better off joining a co-ed sports team to meet eligible singles.