There was a time (right around the transition from recurves to compounds) that the unlimited class people shot releases and peeps in the recurves. So it most definitely can be done.
Although if you are shooting barebow they aren't going to help much, in fact I would bet they would hurt more than help. However if you are shooting sights then one would help just as they do in a compound. They just aren't legal equipment in most shooting venues with a recurve - however if you are just shooting for fun or hunting then it doesn't really matter.
As stated, if you are simply looking for another check on your anchor some form of a kisser would be best for a bare bow shooter. I use a bit of serving tied to the string as one in both my traditional recurves and my Olympic setups. It's light, easy to feel, cheap, and isn't going to get hung up on something in the woods (and this is important both in hunting and shooting NFAA Field Archery - not so much indoor).