You would have to learn enough about whatever game youre playing (Ill assume NLH) to assess their skill level and be honest about your level and whether you should play.
Same folks showing up when you show up is meaningless.
At my old casino it was low limit stud or stud 8 5/10 or less in the morning with elderly folks with a few limit holdem and like 2 nl low limit tables going and its the same group or same ppl playing.
Im grinding lo limit nlh all friday night and come early Saturday morning the army of wheel chairs are coming in as Im leaving or sitting down to play. And guss what, they would be there on Monday or a Wednesday or. . .etc but always in the morning.
I could never find a low limit stud variant unless in the morning. Night was 20/40 stud or kids with sunglasses playing low limkt nlh, now theyre chatting about gto or somethjng and dont know starting
hands, lol.
If youre in a casino enough and know enough about whatever game then youll know who to take seriously and whether you should play at the table though.
The best advice i could give you is to find out how you stack up against them then find a routine to get into.
This is really seems like a topic on table selection and having the discipline to not play if the players are above you or theyre doing crazy wacky things where its going to cause a good/descent player to have huge variance which would be a disaster for someone showing up with 1 or 2 buyins.
And if you dont like the table, then get up and ask for another seat or bail early on the session and do something else.
GL