OP hasn't really given enough information. He is in a better position than any of us to know because he was there. However, I think there is a distinct possibility that Syn is right and she just wants an extra person in her class. Its also possible that she wants to see you again and this was the easiest way without taking the chance of asking to go on a date.
OP needs to consider the whole situation, including:
- how much much attraction was there in the original encounter?
- how much embarrassment is involved in going to this swimfit class and getting in a pool with a bunch of seniors?
- are there other opportunities to see this woman and ask her out, or is this swimfit class the only way?
- if she works for the same company and his motives are just a free boink, then book an escort for an hour instead.
- if his motives are a little more "serious" then what are the potential pitfalls of dating a woman in the same company?
Personally, I'd avoid the swimfit class if at all possible and find a way to bump into her somewhere else to ask her out.
OP needs to consider the whole situation, including:
- how much much attraction was there in the original encounter?
- how much embarrassment is involved in going to this swimfit class and getting in a pool with a bunch of seniors?
- are there other opportunities to see this woman and ask her out, or is this swimfit class the only way?
- if she works for the same company and his motives are just a free boink, then book an escort for an hour instead.
- if his motives are a little more "serious" then what are the potential pitfalls of dating a woman in the same company?
Personally, I'd avoid the swimfit class if at all possible and find a way to bump into her somewhere else to ask her out.