Don't rule out NMS games. One nice thing about them is if you are playing heads up, or with 1 or 2 others, no more can come in, in a good count. OTOH, you can always leave if the count tanks. When to leave depends on a number of factors. For example, if you leave, is there another table you can get into without delay? Or, are you just answering a phone call or taking a bathroom break, then returning to your original table? You can take advantage of their own stupid rule. For example, if the count tanks and you answer your phone, you can sit back down and just wait for the shoe to end. Nobody's going to look at you suspiciously for just sitting there - you have no choice.