I only play at FT, so there's nowhere else I can recommend. I think between 2/4 and 3/6 you should be able to find 4 good tables most days/times, sometimes 6 or more. I play 5 or 6 usually, but rarely are more than 2 of them 3/6. As for 5/10, I haven't played at all, but I've read on 2p2 that it's not much tougher than 3/6. I know that Rizen has experience in those games though, so I'd take his word over some randoms 2p2ers.