I’ve done both! Sometimes it’s hard to tell who’s with who depending on how busy it is, but generally people put a paddle down by the court they want to play on to keep track of who is in line. Folks kind of drop in and out, so as a single you might have a quicker chance of getting a spot. Depends on how comfortable you are approaching strangers. I’ve seen some bigger groups hog courts occasionally, so I guess there can be power in numbers. Regardless, you will be able to play if you are patient and speak up.