in these games you want to play tight and aggressive...
pay attention to what hands everybody is limping or raising...
getting 6:1 looks good, but when holding something like J7 or K6 it is not so likely you will hit a monster... say you have J7 and flop comes 775.. heads up it would be a monster but vs 5-6 players you will loose sometime vs a boat or A7,K7,Q7 and sometimes you win. only get involved if you think you will get paid from any toppair while flop a straight for example... you have J7 and flop is T98 and someone will pay lots of money with AT, then fine... but you also need to be deep for that...
while your odds are getting better your **** hands will have less and less equity vs so many people... so watch out... my advice rather fold and pay attention to how everyone is playing postflop... spot tells and leaks (which is easier when having not to worry about your cards) and once you know how to outplay them, then you can join the party